Income Taxes - Effective Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Line Items]
Income from operations before income taxes	$ 1,563	$ 1,515	$ 662
Provision for income tax at federal statutory rate of 21%	$ 328	$ 318	$ 139
Statutory tax rate (as a percent)	21.00%	21.00%	21.00%
(Decrease) increase in income tax from:
State tax, net of federal income tax effect	$ (24)	$ 3	$ (70)
Property-related	(279)	(205)	(219)
Corporate-owned life insurance cash surrender value	(9)	(8)	(9)
Other	1	0	(3)
Total	$ 17	$ 108	$ (162)
Effective tax rate	1.10%	7.10%	(24.50%)
SCE
Income Tax Disclosure [Line Items]
Income from operations before income taxes	$ 1,914	$ 1,781	$ 845
Provision for income tax at federal statutory rate of 21%	$ 402	$ 374	$ 177
Statutory tax rate (as a percent)	21.00%	21.00%	21.00%
(Decrease) increase in income tax from:
State tax, net of federal income tax effect	$ 0	$ 23	$ (57)
Property-related	(279)	(205)	(219)
Corporate-owned life insurance cash surrender value	(9)	(8)	(9)
Other	6	0	(1)
Total	$ 120	$ 184	$ (109)
Effective tax rate	6.30%	10.30%	(12.90%)