Compensation and Benefit Plans (Expense) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation
Performance incentive plan award (in shares)	71
Share-based compensation available for grant (in shares)	13
Stock-based compensation expense	$ 46	$ 42	$ 39
Income tax benefits related to stock-based compensation expense	7	9	4
Employee Stock Option [Member]
Share-based Compensation
Stock-based compensation expense	12	13	16
Performance shares
Share-based Compensation
Stock-based compensation expense	15	13	9
Restricted stock units
Share-based Compensation
Stock-based compensation expense	17	14	12
Other stock awards
Share-based Compensation
Stock-based compensation expense	2	2	2
SCE
Share-based Compensation
Stock-based compensation expense	26	22	20
Income tax benefits related to stock-based compensation expense	5	5	3
SCE \| Employee Stock Option [Member]
Share-based Compensation
Stock-based compensation expense	6	7	8
SCE \| Performance shares
Share-based Compensation
Stock-based compensation expense	8	6	4
SCE \| Restricted stock units
Share-based Compensation
Stock-based compensation expense	12	9	8
SCE \| Other stock awards
Share-based Compensation
Stock-based compensation expense	$ 0	$ 0	$ 0

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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