Derivative Instruments - Summaries of Notional Volumes and Derivatives Notional Values (Details) - SCE	3 Months Ended	12 Months Ended
Mar. 31, 2025 Bcfe GWh	Dec. 31, 2024 Bcfe GWh
Electricity options, swaps and forwards
Derivatives
Notional volumes of derivative instruments	4,571	3,295
Natural gas options, swaps and forwards
Derivatives
Notional volumes of derivative instruments \| Bcfe	8	4
Congestion revenue rights
Derivatives
Notional volumes of derivative instruments	5,751	8,141

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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