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Employee benefits (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Liabilities    
Short-term employee benefits $ 1,837 $ 1,517
Termination benefits 75 72
Post-employment benefits 13,276 11,398
Total 15,188 12,987
Current 2,739 2,315
Non-current $ 12,449 $ 10,672