Derivative Instruments - Summaries of Notional Volumes and Derivatives Notional Values (Details) - SCE	12 Months Ended
Dec. 31, 2024 GWh Bcfe	Dec. 31, 2023 GWh Bcfe
Electricity options, swaps and forwards
Derivatives
Notional volumes of derivative instruments	3,295	3,494
Natural gas options, swaps and forwards
Derivatives
Notional volumes of derivative instruments \| Bcfe	4,000,000,000	31,000,000,000
Congestion revenue rights
Derivatives
Notional volumes of derivative instruments	8,141	35,011

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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