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Finance debt (Details 5) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]    
Principal $ 31,703 $ 36,557
Interest 24,815 30,557
Total 56,518 $ 67,114
Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Principal 3,106  
Interest 1,928  
Total 5,034  
Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Principal 4,061  
Interest 1,748  
Total 5,809  
Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Principal 3,173  
Interest 1,441  
Total 4,614  
Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Principal 2,665  
Interest 1,282  
Total 3,947  
Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Principal 2,657  
Interest 1,068  
Total 3,725  
Later than five years [member]    
IfrsStatementLineItems [Line Items]    
Principal 16,041  
Interest 17,348  
Total $ 33,389