Summary of Significant Accounting Policies (Organization and Basis of Presentation) (Details) mi² in Thousands	6 Months Ended
Jun. 30, 2016 mi²
Southern California Edison \| Electric Utility
Summary of Significant Accounting Policies [Line Items]
Supply of electricity, area covered (square mile)	50

These concepts are used to disclose significant accounting policies associated with domain members defined in one or many axes to the table.

No definition available.

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