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Lease liabilities (Details 2) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Nominal Future Payments $ 42,031 $ 32,725
Not later than one year [member]    
IfrsStatementLineItems [Line Items]    
Nominal Future Payments 3,415 5,710
Later than one year and not later than two years [member]    
IfrsStatementLineItems [Line Items]    
Nominal Future Payments 5,712 4,621
Later than two years and not later than three years [member]    
IfrsStatementLineItems [Line Items]    
Nominal Future Payments 4,344 3,380
Later than three years and not later than four years [member]    
IfrsStatementLineItems [Line Items]    
Nominal Future Payments 3,135 2,394
Later than four years and not later than five years [member]    
IfrsStatementLineItems [Line Items]    
Nominal Future Payments 2,659 2,122
Later than five years [member]    
IfrsStatementLineItems [Line Items]    
Nominal Future Payments $ 22,766 $ 14,498