v3.26.1
Derivative Instruments - Schedule of Gains/(Losses) of Economic Hedging Activity (Details) - SCE - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Realized $ (38) $ (40)
Unrealized $ (8) $ (23)