Income Taxes (Rate Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Line Items]
Statutory tax rate (as a percent)			21.00%
Income from operations before income taxes	$ 299	$ 429	$ 380	$ 683
Provision for income tax at federal statutory rate of 21%	63	90	80	143
Increase (decrease) in income tax from
State tax, net of federal benefit	(4)	18	(21)	11
Property-related	(48)	(43)	(93)	(126)
Corporate-owned life insurance cash surrender value	(1)	(3)	(4)	(5)
Other	(3)	6	(10)	9
Total income tax expense (benefit)	$ 7	$ 68	$ (48)	$ 32
Effective tax rate (as a percent)	2.30%	15.90%	(12.60%)	4.70%
SCE
Income Tax Disclosure [Line Items]
Statutory tax rate (as a percent)			21.00%
Income from operations before income taxes	$ 349	$ 461	$ 482	$ 760
Provision for income tax at federal statutory rate of 21%	73	97	101	160
Increase (decrease) in income tax from
State tax, net of federal benefit		19	(13)	15
Property-related	(48)	(43)	(93)	(126)
Corporate-owned life insurance cash surrender value	(1)	(3)	(4)	(5)
Other	(2)	6	(9)	8
Total income tax expense (benefit)	$ 22	$ 76	$ (18)	$ 52
Effective tax rate (as a percent)	6.30%	16.50%	(3.70%)	6.80%