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Financial risk management (Details 5) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Cumulative losses in other comprehensive income (shareholders' equity) $ (14,074) $ (20,360)
Cash flow hedges [member]    
IfrsStatementLineItems [Line Items]    
Cumulative losses in other comprehensive income (shareholders' equity) (21,321) (30,845)
Deferred Income Taxes [Member]    
IfrsStatementLineItems [Line Items]    
Cumulative losses in other comprehensive income (shareholders' equity) $ 7,247 $ 10,485