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Summary of Significant Accounting Policies (SCE Dividend Restrictions) (Details) - SCE $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($)
Significant Accounting Policies [Line Items] |
Minimum percentage of weighted-average common equity component authorization, set by CPUC (as a percent) | 48.00%
Weighted-average common equity component authorization, set by CPUC remaining over number of months (in months) | 13 months
After-tax charge excused from capital structure | $ 448
Period for calculation of weighted average common equity component (months) | 13 months
Weighted-average common equity component of total capitalization (as a percent) | 50.00%
Capacity to pay additional dividends | $ 511
Restriction on net assets | $ 14,200
Pro forma |
Significant Accounting Policies [Line Items] |
Weighted-average common equity component authorization, set by CPUC remaining over number of months (in months) | 13 months
Period for calculation of weighted average common equity component (months) | 13 months
Weighted-average common equity component of total capitalization (as a percent) | 50.10%

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- Definition Asset Impairment And Other Charges, Net Of Tax + References No definition available. + Details
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- Definition This element represents the percentage of weighted-average common equity component of total capitalization required to distribute the dividend. + References No definition available. + Details
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- Details
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