Derivative Instruments (Notional Values) (Details) - SCE	3 Months Ended	12 Months Ended
Mar. 31, 2024 GWh Bcfe	Dec. 31, 2023 GWh Bcfe
Electricity options, swaps and forwards (GWh)
Derivatives
Notional volumes of derivative instruments	5,533	3,494
Natural gas options, swaps and forwards (Bcf)
Derivatives
Notional volumes of derivative instruments \| Bcfe	22	31
Congestion revenue rights (GWh)
Derivatives
Notional volumes of derivative instruments	27,612	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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