Income Taxes (Rate Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Line Items]
Statutory tax rate (as a percent)			21.00%	21.00%
Income from operations before income taxes	$ 460	$ 299	$ 838	$ 380
Provision for income tax at federal statutory rate of 21%	97	63	176	80
Increase (decrease) in income tax from:
State tax, net of federal benefit	1	(4)		(21)
Property-related	(47)	(48)	(105)	(93)
Other		(4)	(7)	(14)
Total income tax expense (benefit)	$ 51	$ 7	$ 64	$ (48)
Effective tax rate	11.10%	2.30%	7.60%	(12.60%)
Increase (decrease) to previously recorded tax expense	$ 268
SCE
Income Tax Disclosure [Line Items]
Statutory tax rate (as a percent)			21.00%	21.00%
Income from operations before income taxes	517	$ 349	$ 945	$ 482
Provision for income tax at federal statutory rate of 21%	109	73	198	101
Increase (decrease) in income tax from:
State tax, net of federal benefit	8		11	(13)
Property-related	(47)	(48)	(105)	(93)
Other	(2)	(3)	(7)	(13)
Total income tax expense (benefit)	$ 68	$ 22	$ 97	$ (18)
Effective tax rate	13.20%	6.30%	10.30%	(3.70%)