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available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-1000000-1falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalsefalse00falsefalsefalsefalsefalse6falsefalsefalse00falsefalsefalsefalsefalse7truefalsefalse-1000000-1falsefalsefalsefalsefalse8falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseQuarterly Financial Data, Dividends on Preferred Stock58false0sre_QuarterlyFinancialDataEarningsAttributableToCommonSharessrefalsecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse7400000074falsetruefalsefalsefalse2truefalsefalse7800000078falsetruefalsefalsefalse3truefalsefalse6900000069falsetruefalsefalsefalse4truefalsefalse6500000065falsetruefalsefalsefalse5truefalsefalse7500000075falsetruefalsefalsefalse6truefalsefalse7400000074falsetruefalsefalsefalse7truefalsefalse6500000065falsetruefalsefalsefalse8truefalsefalse5900000059falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.truefalseQuarterly Financial Data, Earnings Attributable To Common Shares1Earnings per share are computed independently for each of the quarters and therefore may not sum to the total for the year.2These amounts are net of fluctuations in nonrecoverable operation and maintenance expenses.856QUARTERLY FINANCIAL DATA (Details) (USD $)MillionsHundredThousandsNoRoundingUnKnownfalsetrue