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Trade and other receivables (Details 1) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Trade receivables $ 8,291 $ 8,825
Expected credit losses (1,533) (1,428)
Current [member]    
IfrsStatementLineItems [Line Items]    
Trade receivables 6,474 7,059
Expected credit losses (39) (77)
Not later than three months [member]    
IfrsStatementLineItems [Line Items]    
Trade receivables 189 218
Expected credit losses (48) (26)
Later than three months and not later than six months [member]    
IfrsStatementLineItems [Line Items]    
Trade receivables 30 40
Expected credit losses (27) (6)
Later than six months and not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade receivables 63 51
Expected credit losses (51) (29)
Later than one year [member]    
IfrsStatementLineItems [Line Items]    
Trade receivables 1,535 1,457
Expected credit losses $ (1,368) $ (1,290)