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This element represents the franchise fees billed to customers.

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Public Utilities, Proposed Base Rate Revenue Requirement

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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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.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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Revenue (Summary of Revenue) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total operating revenue		$ 2,824	$ 2,564
Southern California Edison
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		2,459	2,728
Alternative revenue programs and other operating revenue4		357	(174)
Total operating revenue		2,816	2,554
Receivables related to contracts from customers		1,000		$ 1,100
Accrued unbilled revenues		459		$ 482
Franchise fees billed to customers		28	28
Southern California Edison \| Earning Activities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		1,502	1,536
Alternative revenue programs and other operating revenue4		48	(23)
Total operating revenue		1,550	1,513
Southern California Edison \| Cost- Recovery Activities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers		957	1,192
Alternative revenue programs and other operating revenue4		309	(151)
Total operating revenue		$ 1,266	$ 1,041
Forecast \| Subsequent event \| 2018 base rate revenue requirement \| CPUC \| Southern California Edison
Disaggregation of Revenue [Line Items]
Proposed decision	$ 5,102
Forecast \| Subsequent event \| 2019 base rate revenue requirement \| CPUC \| Southern California Edison
Disaggregation of Revenue [Line Items]
Proposed decision	$ 5,422