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12/31/2008 USD ($) $FROM_Jan01_2008_TO_Dec31_2008_sre_HedgeIneffectivenessByDerivativeContractTypeAxis_HedgeIneffectivenessInterestRateContractsMemberhttp://www.sec.gov/CIK0001032208duration2008-01-01T00:00:002008-12-31T00:00:00falsefalseHedge Ineffectiveness, Interest Rate Contracts [Member]sre_HedgeIneffectivenessByDerivativeContractTypeAxisxbrldihttp://xbrl.org/2006/xbrldisre_HedgeIneffectivenessInterestRateContractsMembersre_HedgeIneffectivenessByDerivativeContractTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseHedge Ineffectiveness, Interest Rate Contracts [Member]624true0sre_HedgeIneffectivenessLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseHedge Ineffectiveness [Line Items]625false0us-gaap_LossOnCashFlowHedgeIneffectivenessus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-1000000-1[11],[2]falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe loss recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1) falsefalseLoss on Cash Flow Hedge Ineffectiveness626false0us-gaap_DerivativeNetHedgeIneffectivenessGainLossus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-1000000-1[2]falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe portion of a hedge deemed to be ineffective that is reflected in current period results of operations.No authoritative reference available.truefalseDerivative, Net Hedge Ineffectiveness Gain (Loss)1Includes Otay Mesa VIE. All of SDG&E's interest rate derivatives relate to Otay Mesa VIE.2For interest rate swap instruments, all companies record ineffectiveness losses in Other Income (Expense), Net on the Consolidated Statements of Operations.3Amounts include Otay Mesa VIE. All of SDG&E's 2010 interest rate derivative activity relates to Otay Mesa VIE.4Related to Otay Mesa VIE. Sempra Energy Consolidated also includes additional instruments.5Included in Current assets: Other for SoCalGas.6Included in Current liabilities: Other for SoCalGas.7Includes Otay Mesa VIE. All of SDG&E's amounts relate to Otay Mesa VIE.8There has been no hedge ineffectiveness on these swaps. Changes in the fair values of the interest rate swap agreements are exactly offset by changes in the fair value of the underlying long-term debt.9Gains reclassified into earnings in 2009 due to changes in cash requirements and associated impacts on forecasted interest payments, primarily related to distributions received from RBS Sempra Commodities. See Note 4.10For commodity derivative instruments, we record ineffectiveness losses in Revenues from Sempra Global and Parent on the Consolidated Statements of Operations.11These losses are associated with Otay Mesa VIE.3243DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue