v3.26.1
Financial Risk Management Activities - Schedule of Derivative Instruments Not Designated as Hedging Instruments and Impact on Results of Operations (Details) - Energy-Related Contracts [Member] - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Offsetting Assets [Line Items]    
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ (353) $ (243)
Operating Revenues [Member]    
Offsetting Assets [Line Items]    
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net (353) (241)
Energy Costs [Member]    
Offsetting Assets [Line Items]    
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 0 $ (2)