Regulatory Assets and Liabilities - Regulatory Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Regulatory Liabilities
Total current	$ 1,347	$ 763
Total long-term	10,159	9,420
SCE
Regulatory Liabilities
Total current	1,347	763
Total long-term	10,159	9,420
Total regulatory liabilities	11,506	10,183
SCE | Regulatory balancing and memorandum accounts
Regulatory Liabilities
Total current	1,144	704
Total long-term	2,023	1,395
SCE | Energy derivatives
Regulatory Liabilities
Total current	165	16
SCE | Other
Regulatory Liabilities
Total current	38	43
Total long-term	15	17
SCE | Costs of removal
Regulatory Liabilities
Total long-term	2,520	2,635
SCE | Deferred income taxes
Regulatory Liabilities
Total long-term	2,163	2,211
SCE | Recoveries in excess of ARO liabilities
Regulatory Liabilities
Total long-term	1,748	1,498
SCE | Pension and other postretirement benefits
Regulatory Liabilities
Total long-term	$ 1,690	$ 1,664