v3.26.1
Risk Management - CF Hedging Effect on the Income Statements (Details) - Designated as Hedging Instrument - Cash flow hedge - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Gain/(loss) recognized in OCI on derivative $ (255) $ (10)
Gain/(loss) reclassified from Accumulated OCI into income (26) 6
Gain/(loss) to be reclassified within twelve months (70)  
Energy commodity derivative contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain/(loss) recognized in OCI on derivative (246) (30)
Energy commodity derivative contracts | Revenues—Commodity sales    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain/(loss) reclassified from Accumulated OCI into income (16) (16)
Energy commodity derivative contracts | Costs of sales    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain/(loss) reclassified from Accumulated OCI into income 0 (1)
Foreign currency contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain/(loss) recognized in OCI on derivative (9) 20
Foreign currency contracts | Other, net    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain/(loss) reclassified from Accumulated OCI into income $ (10) $ 23