v3.26.1
Equity affiliates, other investments and related parties - Equity instruments reconciliation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period $ 1,665 $ 1,543 $ 1,051
Increase - Decrease 320 (45) 527
Change in fair value (71) 167 (35)
Equity instruments as of the end of the period 1,914 1,665 1,543
Fair value through other comprehensive income      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period 511 355 119
Increase - Decrease 244 12 247
Change in fair value (161) 144 (11)
Equity instruments as of the end of the period 594 511 355
Fair value through other comprehensive income | Next Decade Corporation      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period 346 214  
Increase - Decrease     219
Change in fair value (109) 132 (5)
Equity instruments as of the end of the period 237 346 214
Fair value through other comprehensive income | Automotive Cells Company      
Financial structure, financial costs and financial instruments      
Increase - Decrease 177    
Change in fair value (76)    
Equity instruments as of the end of the period 101    
Fair value through other comprehensive income | OGCI Climate Investments Holdings LLP      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period 56 50 34
Increase - Decrease 4 7 14
Change in fair value 5 (1) 2
Equity instruments as of the end of the period 65 56 50
Fair value through other comprehensive income | Chicago Mercantile Exchange (CME)      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period 45    
Change in fair value 8    
Equity instruments as of the end of the period 53 45  
Fair value through other comprehensive income | Other shares (unit value below $50 million)      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period 109 91 85
Increase - Decrease   5 14
Change in fair value   13 (8)
Equity instruments as of the end of the period   109 91
Fair value through other comprehensive income | Other shares excluding CME (unit value below $50 million)      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period 64    
Increase - Decrease 63    
Change in fair value 11    
Equity instruments as of the end of the period 138 64  
Fair value through profit or loss      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period 1,154 1,188 932
Increase - Decrease 76 (57) 280
Change in fair value 90 23 (24)
Equity instruments as of the end of the period 1,320 1,154 1,188
Fair value through profit or loss | Western LNG LLC      
Financial structure, financial costs and financial instruments      
Increase - Decrease 50    
Equity instruments as of the end of the period 50    
Fair value through profit or loss | Hubei Cathay Smart Energy Fund      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period     54
Increase - Decrease     (54)
Fair value through profit or loss | Nordian CPO (renamed TotalEnergies Charging Services Espaa SL)      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period   70  
Increase - Decrease   (70) 70
Equity instruments as of the end of the period     70
Fair value through profit or loss | Other shares (unit value below $50 million)      
Financial structure, financial costs and financial instruments      
Equity instruments as of the beginning of the period 1,154 1,118 878
Increase - Decrease 26 13 264
Change in fair value 90 23 (24)
Equity instruments as of the end of the period $ 1,270 $ 1,154 $ 1,118