Fair Value Measurements (Level 3 Inputs) (Details) - SCE - Level 3 - Congestion revenue rights (GWh) - Auction prices $ in Millions	Mar. 31, 2024 USD ($) $ / MWh	Dec. 31, 2023 USD ($) $ / MWh
Fair Value Measurements
Fair value, Level 3 assets \| $	$ 80	$ 91
Minimum
Fair Value Measurements
Derivative Asset (Liability) Net, Measurement Input	(14.15)	(6.44)
Maximum
Fair Value Measurements
Derivative Asset (Liability) Net, Measurement Input	3,775.52	16,574.36
Weighted Average
Fair Value Measurements
Derivative Asset (Liability) Net, Measurement Input	3.05	2.74

Value of input used to measure net derivative asset (liability).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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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

No definition available.

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- Definition

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-SubTopic 10
-Topic 820
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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