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Employee benefits (Details 10) - Overfunded Pension Plans [Member] - Level 3 of fair value hierarchy [member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Assets as at beginning of the year $ 664 $ 426
Return on plan assets 36 34
Assets purchases 230 315
Assets sold during the year (235) (350)
Translation adjustment 37 26
Transfer between Overfunded pension and Underfunded pension plans (76) 213
Assets as at end of the year 656 664
Trading equity securities [member]    
IfrsStatementLineItems [Line Items]    
Assets as at beginning of the year 240 103
Return on plan assets 5 (5)
Assets purchases 11 10
Assets sold during the year (6) (36)
Translation adjustment 8 4
Transfer between Overfunded pension and Underfunded pension plans (58) 164
Assets as at end of the year 200 240
Ifrs Real Estate Funds [Member]    
IfrsStatementLineItems [Line Items]    
Assets as at beginning of the year 3 5
Return on plan assets   (2)
Assets sold during the year (3)  
Assets as at end of the year 3
Investment property [member]    
IfrsStatementLineItems [Line Items]    
Assets as at beginning of the year 293 212
Return on plan assets 9 15
Assets purchases 8 25
Assets sold during the year (16) (22)
Translation adjustment 18 14
Transfer between Overfunded pension and Underfunded pension plans (18) 49
Assets as at end of the year 294 293
Loan To Participants [Member]    
IfrsStatementLineItems [Line Items]    
Assets as at beginning of the year 128 106
Return on plan assets 22 26
Assets purchases 211 280
Assets sold during the year (210) (292)
Translation adjustment 11 8
Assets as at end of the year $ 162 $ 128