Compensation and Benefit Plans - Summarizes Total Expense and Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation
Total stock-based compensation expense	$ 57	$ 46	$ 42
Income tax benefits related to stock-based compensation expense	23	7	9
Stock options
Share-based Compensation
Total stock-based compensation expense	13	12	13
Performance shares
Share-based Compensation
Total stock-based compensation expense	21	15	13
Restricted stock units
Share-based Compensation
Total stock-based compensation expense	21	17	14
Other
Share-based Compensation
Total stock-based compensation expense	2	2	2
SCE
Share-based Compensation
Total stock-based compensation expense	32	26	22
Income tax benefits related to stock-based compensation expense	14	5	5
SCE | Stock options
Share-based Compensation
Total stock-based compensation expense	7	6	7
SCE | Performance shares
Share-based Compensation
Total stock-based compensation expense	10	8	6
SCE | Restricted stock units
Share-based Compensation
Total stock-based compensation expense	15	12	9
SCE | Other
Share-based Compensation
Total stock-based compensation expense	$ 0	$ 0	$ 0