v3.26.1
Provisions and other non-current liabilities - Asset retirement obligation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Asset Retirement Obligation      
Discount rate for valuation of asset retirement obligation (as a percent) 5.00% 5.00% 5.00%
Inflation rate for valuation of asset retirement obligation (as a percent) 2.00% 2.00% 2.00%
Asset retirement obligations      
Asset Retirement Obligation      
Potential change in discount rate (as a percent) 0.50%    
Increase (decrease) in asset retirement obligation for decrease in discount rate $ 770    
Impact on following year's net income for decrease in discount rate (44)    
Increase (decrease) in asset retirement obligation for increase in discount rate (693)    
Impact on following year's net income for increase in discount rate 41    
Changes in the asset retirement obligation      
Balance as of the beginning of the period 11,359 $ 11,585 $ 13,110
Accretion 589 568 524
Revision in estimates 309 155 (1,499)
New obligations 141 200 108
Spending on existing obligations (612) (464) (339)
Currency translation adjustment 404 (249) 101
Other (2,928) (436) (420)
Balance as of the end of the period 9,262 $ 11,359 $ 11,585
Impact of reclassifications under Liabilities directly associated with the assets classified as held for sale $ (2,754)