Regulatory Assets and Liabilities (Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Regulatory Liabilities [Line Items]
Current regulatory liabilities	$ 964	$ 603
Long-term regulatory liabilities	8,211	8,981
SCE
Regulatory Liabilities [Line Items]
Current regulatory liabilities	964	603
Long-term regulatory liabilities	8,211	8,981
Total regulatory liabilities	9,175	9,584
SCE | Revenue subject to refund
Regulatory Liabilities [Line Items]
Current regulatory liabilities	584	553
Long-term regulatory liabilities	1,116	648
SCE | Energy derivatives
Regulatory Liabilities [Line Items]
Current regulatory liabilities	338	25
SCE | Costs of removal
Regulatory Liabilities [Line Items]
Long-term regulatory liabilities	2,589	2,552
SCE | Re-measurement of deferred taxes
Regulatory Liabilities [Line Items]
Long-term regulatory liabilities	2,250	2,315
SCE | Recoveries in excess of ARO liabilities
Regulatory Liabilities [Line Items]
Long-term regulatory liabilities	1,231	2,155
SCE | Pension and other postretirement benefits
Regulatory Liabilities [Line Items]
Long-term regulatory liabilities	1,007	1,281
SCE | Other regulatory assets or liabilities
Regulatory Liabilities [Line Items]
Current regulatory liabilities	42	25
Long-term regulatory liabilities	$ 18	$ 30