Revenue - Schedule of Revenue (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Revenue from contracts with customers
Total operating revenue	$ 4,357	$ 4,543	$ 8,460	$ 8,354
SCE
Revenue from contracts with customers
Total revenue from contracts with customer	4,600	4,153	8,650	7,922
Alternative revenue program and other	(252)	379	(206)	412
Total operating revenue	4,348	4,532	8,444	8,334
SCE \| Commercial
Revenue from contracts with customers
Total revenue from contracts with customer	2,073	1,874	3,423	3,422
SCE \| Residential
Revenue from contracts with customers
Total revenue from contracts with customer	1,759	1,506	3,909	3,085
SCE \| Other
Revenue from contracts with customers
Total revenue from contracts with customer	$ 768	$ 773	$ 1,318	$ 1,415

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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