Derivative Instruments (Hedging Activities) (Details) - SCE - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Realized	$ (187)	$ (57)	$ (313)	$ 52
Unrealized	$ (19)	$ 34	$ (56)	$ (344)