v3.26.1
Income taxes - Deferred tax balances (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Deferred tax assets and liabilities        
NET DEFERRED TAX LIABILITY $ (9,276) $ (8,912) $ (8,270) $ (5,972)
Net operating losses and tax carry forwards        
Deferred tax assets and liabilities        
Deferred tax asset 3,349 3,324 3,098  
Employee benefits        
Deferred tax assets and liabilities        
Deferred tax asset 500 436 415  
Other temporary non-deductible provisions or tax deductions        
Deferred tax assets and liabilities        
Deferred tax asset 6,693 6,886 7,569  
Deferred tax liability (4,131) (4,555) (3,909)  
Differences in depreciations        
Deferred tax assets and liabilities        
Deferred tax liability $ (15,687) $ (15,003) $ (15,443)