v3.26.1
Employee benefits (Details 5) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Current assets $ 18,291 $ 13,481
Non-current assets 68,234 66,671
Assets 86,525 80,152
Current liabilities 15,870 13,090
Non-current liabilities 36,305 32,534
Liabilities 52,175 45,624
Foreign countries [member]    
IfrsStatementLineItems [Line Items]    
Benefit obligation (Plan assets) as at beginning of the year 860 1,071
Interest income 107 69
Changes on asset ceiling (64) (76)
Translation adjustment 94 (204)
Benefit obligation (Plan assets) as at ending of the year 997 860
Net defined benefit liability (asset) (1,164) (1,070)
Current assets 30
Non-current assets 88 110
Assets 118 110
Current liabilities (68) (62)
Non-current liabilities (1,214) (1,118)
Liabilities (1,282) (1,180)
Foreign countries [member] | Present Value Of Actuarial Liabilities [Member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) (5,638) (5,269)
Foreign countries [member] | Fair Value Of Assets [Member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) 5,471 5,059
Foreign countries [member] | Effect of asset ceiling [member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) $ (997) $ (860)