Derivative Instruments (Hedging Activities) (Details) - SCE - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Realized	$ (7)	$ 129	$ 109	$ 110
Unrealized	$ (114)	$ (88)	$ (378)	$ (35)