Compensation and Benefit Plans (Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Plans
Pension and Other Postretirement Benefits
Service cost	$ 30	$ 34	$ 60	$ 68
Non-service cost (benefit)
Interest cost	27	26	54	52
Expected return on plan assets	(57)	(56)	(114)	(112)
Settlement costs	3		3
Amortization of net (gain) loss	1	3	2	6
Regulatory adjustment	2	4	4	8
Total non-service benefit	(24)	(23)	(51)	(46)
Total expense recognized	6	11	9	22
Reclassed from other comprehensive loss	2	3	4	6
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Service cost	8	10	16	20
Non-service cost (benefit)
Interest cost	14	14	28	28
Expected return on plan assets	(24)	(27)	(48)	(54)
Amortization of net (gain) loss	(12)	(8)	(24)	(16)
Regulatory adjustment	14	11	28	22
Total non-service benefit	(8)	(10)	(16)	(20)
SCE
Non-service cost (benefit)
Total non-service benefit	(31)	(33)	(65)	(66)
SCE | Pension Plans
Pension and Other Postretirement Benefits
Service cost	29	33	58	66
Non-service cost (benefit)
Interest cost	25	24	50	48
Expected return on plan assets	(54)	(53)	(108)	(106)
Settlement costs	3		3
Amortization of net (gain) loss	1	2	2	4
Regulatory adjustment	2	4	4	8
Total non-service benefit	(23)	(23)	(49)	(46)
Total expense recognized	6	10	9	20
Reclassed from other comprehensive loss	1	$ 2	$ 2	$ 4
Settlement loss after tax	$ (2)