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Finance debt (Details 2) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Opening balance $ 35,700 $ 53,889
Proceeds from finance debt 2,880 1,754
Repayment of principal (*) (9,196) (19,107)
Repayment of interest (*) (1,846) (1,858)
Accrued interest (**) 2,263 2,211
Foreign exchange/ inflation indexation charges (460) 255
Translation adjustment 6 (4)
Translation adjustment 613 (428)
Ending balance 29,954 36,716
Brazil [Member]    
IfrsStatementLineItems [Line Items]    
Opening balance 4,517 8,854
Proceeds from finance debt 853  
Repayment of principal (*) 1,013 4,213
Repayment of interest (*) 292 245
Accrued interest (**) 396 241
Foreign exchange/ inflation indexation charges 120 173
Translation adjustment 326 228
Ending balance 4,907 4,582
Foreign countries [member]    
IfrsStatementLineItems [Line Items]    
Opening balance 31,183 45,035
Proceeds from finance debt 2,027 1,754
Repayment of principal (*) (8,183) (14,894)
Repayment of interest (*) (1,554) (1,613)
Accrued interest (**) 1,867 1,970
Foreign exchange/ inflation indexation charges (580) 82
Translation adjustment 287 (200)
Ending balance $ 25,047 $ 32,134