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Regulatory Assets and Liabilities (Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Regulatory Assets |  |
Current regulatory assets | $ 2,524 | $ 2,497
Regulatory assets: non-current | 8,897 | 8,181
SCE |  |
Regulatory Assets |  |
Current regulatory assets | 2,524 | 2,497
Regulatory assets: non-current | 8,897 | 8,181
Total regulatory assets | 11,421 | 10,678
SCE | Regulatory balancing and memorandum accounts-Assets |  |
Regulatory Assets |  |
Current regulatory assets | 2,502 | 2,400
Regulatory assets: non-current | 1,257 | 1,589
SCE | Power contracts |  |
Regulatory Assets |  |
Current regulatory assets |  | 71
SCE | Deferred income taxes |  |
Regulatory Assets |  |
Regulatory assets: non-current | 5,533 | 5,178
SCE | Unamortized investments, net of accumulated amortization |  |
Regulatory Assets |  |
Regulatory assets: non-current | 110 | 113
SCE | Unamortized losses on reacquired debt |  |
Regulatory Assets |  |
Regulatory assets: non-current | 99 | 109
SCE | Environmental remediation |  |
Regulatory Assets |  |
Regulatory assets: non-current | 226 | 241
SCE | Recovery assets |  |
Regulatory Assets |  |
Regulatory assets: non-current | 1,558 | 834
SCE | Other regulatory assets or liabilities |  |
Regulatory Assets |  |
Current regulatory assets | 22 | 26
Regulatory assets: non-current | $ 114 | $ 117

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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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 + Details
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