Compensation and Benefit Plans (Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pension Plans
Pension and Other Postretirement Benefits
Service cost	$ 25	$ 30	$ 50	$ 60
Non-service cost (benefit)
Interest cost	45	27	90	54
Expected return on plan assets	(54)	(57)	(108)	(114)
Settlement costs		3		3
Amortization of net loss	1	1	2	2
Regulatory adjustment	(12)	2	(24)	4
Total non-service benefit	(20)	(24)	(40)	(51)
Total expense	5	6	10	9
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Service cost	5	8	10	16
Non-service cost (benefit)
Interest cost	18	14	36	28
Expected return on plan assets	(27)	(24)	(54)	(48)
Amortization of net loss	(12)	(12)	(24)	(24)
Regulatory adjustment	16	14	32	28
Total non-service benefit	(5)	(8)	(10)	(16)
SCE
Non-service cost (benefit)
Total non-service benefit	(26)	(31)	(52)	(65)
SCE | Pension Plans
Pension and Other Postretirement Benefits
Service cost	24	29	48	58
Non-service cost (benefit)
Interest cost	42	25	84	50
Expected return on plan assets	(51)	(54)	(102)	(108)
Settlement costs		3		3
Amortization of net loss		1		2
Regulatory adjustment	(12)	2	(24)	4
Total non-service benefit	(21)	(23)	(42)	(49)
Total expense	$ 3	$ 6	$ 6	$ 9