Regulatory Assets and Liabilities (Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Regulatory Liabilities [Line Items]
Current regulatory liabilities	$ 797	$ 964
Long-term regulatory liabilities	8,735	8,211
SCE
Regulatory Liabilities [Line Items]
Current regulatory liabilities	797	964
Long-term regulatory liabilities	8,735	8,211
Total regulatory liabilities	9,532	9,175
SCE | Regulatory balancing and memorandum accounts-Liabilities
Regulatory Liabilities [Line Items]
Current regulatory liabilities	779	584
Long-term regulatory liabilities	1,353	1,116
SCE | Energy derivatives
Regulatory Liabilities [Line Items]
Current regulatory liabilities		338
SCE | Costs of removal
Regulatory Liabilities [Line Items]
Long-term regulatory liabilities	2,705	2,589
SCE | Re-measurement of deferred taxes
Regulatory Liabilities [Line Items]
Long-term regulatory liabilities	2,224	2,250
SCE | Recoveries in excess of ARO liabilities
Regulatory Liabilities [Line Items]
Long-term regulatory liabilities	1,444	1,231
SCE | Pension and other postretirement benefits
Regulatory Liabilities [Line Items]
Long-term regulatory liabilities	992	1,007
SCE | Other regulatory assets or liabilities
Regulatory Liabilities [Line Items]
Current regulatory liabilities	18	42
Long-term regulatory liabilities	$ 17	$ 18