Regulatory Assets and Liabilities (Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Regulatory Assets [Line Items]
Current regulatory assets	$ 2,817	$ 2,497
Regulatory assets: non-current	8,151	8,181
SCE
Regulatory Assets [Line Items]
Current regulatory assets	2,817	2,497
Regulatory assets: non-current	8,151	8,181
Total regulatory assets	10,968	10,678
SCE \| Regulatory balancing accounts
Regulatory Assets [Line Items]
Current regulatory assets	2,743	2,400
Regulatory assets: non-current	1,468	1,589
SCE \| Power contracts
Regulatory Assets [Line Items]
Current regulatory assets	49	71
SCE \| Deferred income taxes, net of liabilities
Regulatory Assets [Line Items]
Regulatory assets: non-current	5,282	5,178
SCE \| Unamortized investments, net of accumulated amortization
Regulatory Assets [Line Items]
Regulatory assets: non-current	111	113
SCE \| Unamortized loss on reacquired debt
Regulatory Assets [Line Items]
Regulatory assets: non-current	106	109
SCE \| Environmental remediation
Regulatory Assets [Line Items]
Regulatory assets: non-current	238	241
SCE \| Recovery assets
Regulatory Assets [Line Items]
Regulatory assets: non-current	827	834
SCE \| Other regulatory assets or liabilities
Regulatory Assets [Line Items]
Current regulatory assets	25	26
Regulatory assets: non-current	$ 119	$ 117

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.

No definition available.

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- Definition

The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 340
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382

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- Definition

Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.

+ References

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Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer.

+ References

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