Regulatory Assets and Liabilities (Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Regulatory Liabilities
Current regulatory liabilities	$ 763	$ 964
Long-term regulatory liabilities	9,420	8,211
SCE
Regulatory Liabilities
Current regulatory liabilities	763	964
Long-term regulatory liabilities	9,420	8,211
Total regulatory liabilities	10,183	9,175
SCE | Regulatory balancing and memorandum accounts-Liabilities
Regulatory Liabilities
Current regulatory liabilities	704	584
Long-term regulatory liabilities	1,395	1,116
SCE | Energy derivatives
Regulatory Liabilities
Current regulatory liabilities	16	338
SCE | Costs of removal
Regulatory Liabilities
Long-term regulatory liabilities	2,635	2,589
SCE | Deferred income taxes
Regulatory Liabilities
Long-term regulatory liabilities	2,211	2,250
SCE | Recoveries in excess of ARO liabilities
Regulatory Liabilities
Long-term regulatory liabilities	1,498	1,231
SCE | Pension and other postretirement benefits
Regulatory Liabilities
Long-term regulatory liabilities	1,664	1,007
SCE | Other regulatory assets or liabilities
Regulatory Liabilities
Current regulatory liabilities	43	42
Long-term regulatory liabilities	$ 17	$ 18