Variable Interest Entities (Income Statement) (Details) - SCE - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Trust II
Variable Interest Entities
Dividend income	$ 3	$ 3
Dividend distributions	3	3
Trust III
Variable Interest Entities
Dividend income	4	4
Dividend distributions	4	4
Trust IV
Variable Interest Entities
Dividend income	4	4
Dividend distributions	4	4
Trust V
Variable Interest Entities
Dividend income	4	4
Dividend distributions	4	4
Trust VI
Variable Interest Entities
Dividend income	6	6
Dividend distributions	6	$ 6
Trust VII
Variable Interest Entities
Dividend income	10
Dividend distributions	$ 10