Compensation and Benefit Plans (Employee Savings Plan) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution Plans [Line Items]
Employer contributions	$ 121	$ 103	$ 97
SCE
Defined Contribution Plans [Line Items]
Employer contributions	$ 119	$ 101	$ 96