Income Taxes (Rate Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Tax
Statutory tax rate (as a percent)	21.00%	21.00%	21.00%	21.00%
Income from operations before income taxes	$ 568	$ 460	$ 507	$ 838
Provision for income tax at federal statutory rate of 21%	119	97	106	176
Increase (decrease) in income tax from:
State tax, net of federal income tax effect	7	1	(30)
Property-related	(62)	(47)	(117)	(105)
Other	(5)		(13)	(7)
Total income tax (benefit) expense	$ 59	$ 51	$ (54)	$ 64
Effective tax rate	10.40%	11.10%	(10.70%)	7.60%
SCE
Income Tax
Statutory tax rate (as a percent)	21.00%	21.00%	21.00%	21.00%
Income from operations before income taxes	$ 655	$ 517	$ 677	$ 945
Provision for income tax at federal statutory rate of 21%	138	109	142	198
Increase (decrease) in income tax from:
State tax, net of federal income tax effect	13	8	(18)	11
Property-related	(62)	(47)	(117)	(105)
Other	(6)	(2)	(8)	(7)
Total income tax (benefit) expense	$ 83	$ 68	$ (1)	$ 97
Effective tax rate	12.70%	13.20%	(0.10%)	10.30%