Derivative Instruments (Notional Values) (Details) - SCE	9 Months Ended	12 Months Ended
Sep. 30, 2023 Bcfe GWh	Dec. 31, 2022 GWh Bcfe
Electricity options, swaps and forwards (GWh)
Derivatives
Notional volumes of derivative instruments	2,299	1,022
Natural gas options, swaps and forwards (Bcf)
Derivatives
Notional volumes of derivative instruments \| Bcfe	34	42
Congestion revenue rights (GWh)
Derivatives
Notional volumes of derivative instruments	30,770	44,028

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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