Variable Interest Entities (Income Statement) (Details) - SCE - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Trust II
Variable Interest Entity
Dividend income	$ 11	$ 11	$ 20
Dividend distributions	11	11	20
Trust III
Variable Interest Entity
Dividend income	16	16	16
Dividend distributions	16	16	16
Trust IV
Variable Interest Entity
Dividend income	17	17	17
Dividend distributions	17	17	17
Trust V
Variable Interest Entity
Dividend income	16	16	16
Dividend distributions	16	16	16
Trust VI
Variable Interest Entity
Dividend income	24	24	24
Dividend distributions	24	$ 24	$ 24
Trust VII
Variable Interest Entity
Dividend income	4
Dividend distributions	$ 4