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Derivative Instruments - Schedule of Notional Volumes of Derivative Instruments (Details) - SCE	9 Months Ended	12 Months Ended
	Sep. 30, 2025 Bcfe GWh	Dec. 31, 2024 Bcfe GWh
Electricity options, swaps and forwards
Derivatives
Economic Hedges	5,679	3,295
Natural gas options, swaps and forwards
Derivatives
Economic Hedges | Bcfe	8	4
Congestion revenue rights
Derivatives
Economic Hedges	4,973	8,141
Fin Toll arrangements
Derivatives
Economic Hedges	236	0

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: 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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- Definition

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+ References

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