Income Taxes (Expense (Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal	$ 2	$ 0	$ 13
State	13	(179)	(22)
Total current	15	(179)	(9)
Deferred:
Federal	(103)	83	(230)
State	(74)	(40)	(66)
Total deferred	(177)	43	(296)
Total income tax expense (benefit)	(162)	(136)	(305)
SCE
Current:
Federal	0	0	12
State	2	(45)	(26)
Total current	2	(45)	(14)
Deferred:
Federal	(44)	83	(207)
State	(67)	(21)	(56)
Total deferred	(111)	62	(263)
Total income tax expense (benefit)	$ (109)	$ 17	$ (277)