Compensation and Benefit Plans (Expenses) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Plans
Pension and Other Postretirement Benefits
Service cost	$ 30		$ 34	$ 90	$ 102
Non-service cost (benefit)
Interest cost	27		26	81	78
Expected return on plan assets	(57)		(56)	(171)	(168)
Settlement costs				3
Amortization of net (gain) loss	1		3	3	9
Regulatory adjustment	2		4	6	12
Total non-service benefit	(27)		(23)	(78)	(69)
Total expense recognized	3		11	12	33
Reclassed from other comprehensive loss	2		3	6	9
Postretirement Benefits Other Than Pensions
Pension and Other Postretirement Benefits
Service cost	8		10	24	30
Non-service cost (benefit)
Interest cost	14		14	42	42
Expected return on plan assets	(24)		(27)	(72)	(81)
Amortization of net (gain) loss	(12)		(8)	(36)	(24)
Regulatory adjustment	14		11	42	33
Total non-service benefit	(8)		(10)	(24)	(30)
SCE
Non-service cost (benefit)
Total non-service benefit	(34)		(33)	(99)	(99)
SCE | Pension Plans
Pension and Other Postretirement Benefits
Service cost	29		33	87	99
Non-service cost (benefit)
Interest cost	25		24	75	72
Expected return on plan assets	(54)		(53)	(162)	(159)
Settlement costs		$ 3		3
Amortization of net (gain) loss	1		2	3	6
Regulatory adjustment	2		4	6	12
Total non-service benefit	(26)		(23)	(75)	(69)
Total expense recognized	3		10	12	30
Reclassed from other comprehensive loss	$ 1		$ 2	$ 3	$ 6
Settlement loss after tax		$ (2)