Regulatory Assets and Liabilities (Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Regulatory Liabilities
Current regulatory liabilities	$ 563	$ 1,347
Long-term regulatory liabilities	10,430	10,159
SCE
Regulatory Liabilities
Current regulatory liabilities	563	1,347
Long-term regulatory liabilities	10,430	10,159
Total regulatory liabilities	10,993	11,506
SCE | Regulatory balancing and memorandum accounts
Regulatory Liabilities
Current regulatory liabilities	386	1,144
Long-term regulatory liabilities	2,264	2,023
SCE | Costs of removal
Regulatory Liabilities
Long-term regulatory liabilities	2,585	2,520
SCE | Deferred income taxes
Regulatory Liabilities
Long-term regulatory liabilities	2,150	2,163
SCE | Recoveries in excess of ARO liabilities
Regulatory Liabilities
Long-term regulatory liabilities	1,714	1,748
SCE | Pension and other postretirement benefits
Regulatory Liabilities
Long-term regulatory liabilities	1,696	1,690
SCE | Other
Regulatory Liabilities
Current regulatory liabilities	35	38
Long-term regulatory liabilities	21	15
SCE | Deferred Derivative Gain (Loss)
Regulatory Liabilities
Current regulatory liabilities	$ 142	$ 165