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Provisions (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Current liabilities $ 1,036 $ 1,045
Non-current liabilities 2,446 3,419
Legal proceedings provision [member]    
IfrsStatementLineItems [Line Items]    
Current liabilities 106 93
Non-current liabilities 1,186 1,012
Employee postretirement obligations (note 29)    
IfrsStatementLineItems [Line Items]    
Current liabilities 66 99
Non-current liabilities 1,260 1,533
Payroll, related charges and other remunerations    
IfrsStatementLineItems [Line Items]    
Current liabilities $ 864 816
Onerous contracts provision [member]    
IfrsStatementLineItems [Line Items]    
Current liabilities   37
Non-current liabilities   $ 874