Income Taxes (Deferred Tax Liability) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Property	$ 894	$ 859
Wildfire-related	356	458
Nuclear decommissioning trust assets in excess of nuclear ARO liability	380	321
Loss and credit carryforwards	3,486	3,479
Regulatory balances	626	641
Pension and postretirement benefits other than pensions, net	127	130
Leases	345	406
Other	159	162
Sub-total	6,373	6,456
Less: valuation allowance	17	39
Total	6,356	6,417
Deferred tax liabilities:
Property	10,627	10,091
Regulatory balances	1,450	1,462
Nuclear decommissioning trust assets	380	321
Leases	345	406
Other	187	225
Total	12,989	12,505
Accumulated deferred income tax liability, net	6,633	6,088
Operating loss carryforwards valuation allowance	363	310
Operating loss carryforward
Deferred tax assets:
Less: valuation allowance	17	35
Capital loss from sale of SoCore Energy
Deferred tax assets:
Less: valuation allowance		4
SCE
Deferred tax assets:
Property	877	840
Wildfire-related	354	457
Nuclear decommissioning trust assets in excess of nuclear ARO liability	380	321
Loss and credit carryforwards	2,103	2,157
Regulatory balances	626	641
Pension and postretirement benefits other than pensions, net	25	26
Leases	345	406
Other	147	135
Sub-total	4,857	4,983
Less: valuation allowance	0	0
Total	4,857	4,983
Deferred tax liabilities:
Property	10,611	10,078
Regulatory balances	1,450	1,462
Nuclear decommissioning trust assets	380	321
Leases	345	406
Other	158	200
Total	12,944	12,467
Accumulated deferred income tax liability, net	8,087	7,484
Operating loss carryforwards valuation allowance	$ 299	$ 254