v3.25.2
Employee benefits (Details 3) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Overfunded Pension Plans [Member]    
IfrsStatementLineItems [Line Items]    
Benefit obligation (Plan assets) as at beginning of the year $ 860 $ 1,071
Interest income 31 69
Changes on asset ceiling 41 (76)
Translation adjustment 105 (204)
Benefit obligation (Plan assets) as at ending of the year 1,037 860
Net defined benefit liability (asset) 116 110
Current provisions for employee benefits 10  
Non-current provisions for employee benefits 106 110
Provisions for employee benefits 116 110
Overfunded Pension Plans [Member] | Present Value Of Actuarial Liabilities [Member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) (3,554) (3,346)
Overfunded Pension Plans [Member] | Fair Value Of Assets [Member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) 4,707 4,316
Overfunded Pension Plans [Member] | Effect of asset ceiling [member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) (1,037) (860)
Underfunded Pension Plans And Other Benefits [Member]    
IfrsStatementLineItems [Line Items]    
Interest income  
Changes on asset ceiling  
Net defined benefit liability (asset) (1,231) (1,180)
Current provisions for employee benefits (61) (62)
Non-current provisions for employee benefits (1,170) (1,118)
Provisions for employee benefits (1,231) (1,180)
Underfunded Pension Plans And Other Benefits [Member] | Present Value Of Actuarial Liabilities [Member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) (2,036) (1,923)
Underfunded Pension Plans And Other Benefits [Member] | Fair Value Of Assets [Member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) $ 805 $ 743