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Regulatory Assets and Liabilities - Schedule of Regulatory Assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Regulatory Assets
Total current	$ 2,703	$ 2,748
Regulatory assets: non-current	10,686	8,886
SCE
Regulatory Assets
Total current	2,703	2,748
Regulatory assets: non-current	10,686	8,886
Total regulatory assets	13,389	11,634
SCE | Regulatory balancing and memorandum accounts
Regulatory Assets
Total current	2,669	2,723
Regulatory assets: non-current	2,274	867
SCE | Deferred income taxes
Regulatory Assets
Regulatory assets: non-current	6,376	5,982
SCE | Unamortized investments, net of accumulated amortization
Regulatory Assets
Regulatory assets: non-current	124	115
SCE | Unamortized losses on reacquired debt
Regulatory Assets
Regulatory assets: non-current	81	88
SCE | Environmental remediation
Regulatory Assets
Regulatory assets: non-current	217	222
SCE | Recovery assets
Regulatory Assets
Regulatory assets: non-current	1,476	1,512
SCE | Other
Regulatory Assets
Total current	34	25
Regulatory assets: non-current	$ 138	$ 100

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

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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.

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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.

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