Variable Interest Entities (Income Statement) (Details) - SCE - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Trust II
Variable Interest Entity
Dividend income	$ 2	$ 2	$ 8	$ 8
Dividend distributions	2	2	8	8
Trust III
Variable Interest Entity
Dividend income	4	4	12	12
Dividend distributions	4	4	12	12
Trust IV
Variable Interest Entity
Dividend income	4	4	13	13
Dividend distributions	4	4	13	13
Trust V
Variable Interest Entity
Dividend income	4	4	12	12
Dividend distributions	4	4	12	12
Trust VI
Variable Interest Entity
Dividend income	6	6	18	18
Dividend distributions	$ 6	$ 6	$ 18	$ 18