v3.26.1
Financial Instruments and Derivatives (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Debt instrument [Line Items]      
Initial margin collateral receivable $ 1,900   $ 500
Proceeds from hedge, financing activities 3,400    
Not Designated as Hedging Instrument | Sales and other operating revenue      
Debt instrument [Line Items]      
Unrealized gain (loss) on derivative instruments (3,800) $ 19  
Short-term line of credit      
Debt instrument [Line Items]      
Line of credit 7,300    
Long-term line of credit      
Debt instrument [Line Items]      
Line of credit $ 300