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definition available.No authoritative reference available.falsefalseNotional amount of interest rate derivatives10false0sre_InterestRateDerivativesMaturitiesMinimumsrefalsenadurationNo definition 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definition available.No authoritative reference available.falsefalseMaturities of interest rate derivatives, maximum12false0sre_InterestRateDerivativesMaturitiessrefalsenadurationNo definition 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definition available.falsefalseOther Derivatives Not Designated as Hedging Instruments at Fair Value, Net, Total [Abstract]16false0sre_DerivativeInterestRateInstrumentsNondesignatedsrefalsedebitinstantNo definition 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definition available.No authoritative reference available.falsefalseInterest rate interest rate instruments not designated as hedging instruments17false0sre_DerivativeCommodityContractsNotSubjectToRateRecoveryNondesignatedsrefalsedebitinstantNo definition 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definition available.No authoritative reference available.falsefalseCommodity contracts not subject to rate recovery not designated as hedging instruments18false0sre_DerivativeOffsettingCommodityContractsNotSubjectToRateRecoveryNondesignatedsrefalsecreditinstantNo definition 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definition available.No authoritative reference available.falsefalseAssociated offsetting commodity contracts not subject to rate recovery19false0sre_DerivativeCommodityContractsSubjectToRateRecoveryNondesignatedsrefalsedebitinstantNo definition 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definition available.No authoritative reference available.falsefalseDerivative commodity contracts subject to rate recovery not designated as hedging instruments20false0sre_DerivativeOffsettingCommodityContractsSubjectToRateRecoveryNondesignatedsrefalsecreditinstantNo definition 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definition available.No authoritative reference available.falsefalseAssociated offsetting commodity contracts subject to rate recovery21false0us-gaap_OtherDerivativesNotDesignatedAsHedgingInstrumentsAtFairValueNetus-gaaptruedebitinstantNo definition 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fair value of all derivative instruments not designated as a hedging instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 truefalseTotal derivatives not designated as hedging instruments22true0us-gaap_DerivativeInstrumentsGainLossLineItemsus-gaaptruenadurationNo definition 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amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b falsefalseGain (loss) on derivative recognized in earnings24false0us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNetus-gaaptruecreditdurationNo definition 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effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -Clause 2 falsefalseAmount of pretax gain (loss) on derivative recognized in OCI (effective portion)25false0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNetus-gaaptruecreditdurationNo definition 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income statement location of the effective portion of net gain or loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -Clause 3 falsefalseGain (loss) reclassified from AOCI into earnings (effective portion)26true0sre_ReclassificationOfCashFlowHedgeGainLossLineItemssrefalsenadurationNo definition 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estimated net amount of existing gains (losses) on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(2) falsefalseCash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months28true0sre_DerivativeCreditRiskRelatedContingentFeaturesLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalse18falsefalsefalse00falsefalsefalsetruefalse19falsefalsefalse00falsefalsefalsetruefalse20falsefalsefalse00falsefalsefalsetruefalse21falsefalsefalse00falsefalsefalsetruefalse22falsefalsefalse00falsefalsefalsetruefalse23falsefalsefalse00falsefalsefalsetruefalse24falsefalsefalse00falsefalsefalsetruefalse25falsefalsefalse00falsefalsefalsetruefalse26falsefalsefalse00falsefalsefalsetruefalse27falsefalsefalse00falsefalsefalsetruefalse28falsefalsefalse00falsefalsefalsetruefalse29falsefalsefalse00falsefalsefalsetruefalse30falsefalsefalse00falsefalsefalsetruefalse31falsefalsefalse00falsefalsefalsetruefalse32falsefalsefalse00falsefalsefalsetruefalse33falsefalsefalse00falsefalsefalsetruefalse34falsefalsefalse00falsefalsefalsetruefalse35falsefalsefalse00falsefalsefalsetruefalse36falsefalsefalse00falsefalsefalsetruefalse37falsefalsefalse00falsefalsefalsetruefalse38falsefalsefalse00falsefalsefalsetruefalse39falsefalsefalse00falsefalsefalsetruefalse40falsefalsefalse00falsefalsefalsetruefalse41falsefalsefalse00falsefalsefalsetruefalse42falsefalsefalse00falsefalsefalsetruefalse43falsefalsefalse00falsefalsefalsetruefalse44falsefalsefalse00falsefalsefalsetruefalse45falsefalsefalse00falsefalsefalsetruefalse46falsefalsefalse00falsefalsefalsetruefalse47falsefalsefalse00falsefalsefalsetruefalse48falsefalsefalse00falsefalsefalsetruefalse49falsefalsefalse00falsefalsefalsetruefalse50falsefalsefalse00falsefalsefalsetruefalse51falsefalsefalse00falsefalsefalsetruefalse52falsefalsefalse00falsefalsefalsetruefalse53falsefalsefalse00falsefalsefalsetruefalse54falsefalsefalse00falsefalsefalsetruefalse55falsefalsefalse00falsefalsefalsetruefalse56falsefalsefalse00falsefalsefalsetruefalse57falsefalsefalse00falsefalsefalsetruefalse58falsefalsefalse00falsefalsefalsetruefalse59falsefalsefalse00falsefalsefalsetruefalse60falsefalsefalse00falsefalsefalsetruefalse61falsefalsefalse00falsefalsefalsetruefalse62falsefalsefalse00falsefalsefalsetruefalse63falsefalsefalse00falsefalsefalsetruefalse64falsefalsefalse00falsefalsefalsetruefalse65falsefalsefalse00falsefalsefalsetruefalse66falsefalsefalse00falsefalsefalsetruefalse67falsefalsefalse00falsefalsefalsetruefalse68falsefalsefalse00falsefalsefalsetruefalse69falsefalsefalse00falsefalsefalsetruefalse70falsefalsefalse00falsefalsefalsetruefalse71falsefalsefalse00falsefalsefalsetruefalse72falsefalsefalse00falsefalsefalsetruefalse73falsefalsefalse00falsefalsefalsetruefalse74falsefalsefalse00falsefalsefalsetruefalse75falsefalsefalse00falsefalsefalsetruefalse76falsefalsefalse00falsefalsefalsetruefalse77falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseDerivative Credit Risk Related Contingent Features [Line Items]29false0us-gaap_DerivativeNetLiabilityPositionAggregateFairValueus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse50000005falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11truefalsefalse20000002falsefalsefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalse18falsefalsefalse00falsefalsefalsetruefalse19falsefalsefalse00falsefalsefalsetruefalse20falsefalsefalse00falsefalsefalsetruefalse21falsefalsefalse00falsefalsefalsetruefalse22falsefalsefalse00falsefalsefalsetruefalse23falsefalsefalse00falsefalsefalsetruefalse24falsefalsefalse00falsefalsefalsetruefalse25falsefalsefalse00falsefalsefalsetruefalse26falsefalsefalse00falsefalsefalsetruefalse27falsefalsefalse00falsefalsefalsetruefalse28falsefalsefalse00falsefalsefalsetruefalse29falsefalsefalse00falsefalsefalsetruefalse30falsefalsefalse00falsefalsefalsetruefalse31falsefalsefalse00falsefalsefalsetruefalse32falsefalsefalse00falsefalsefalsetruefalse33falsefalsefalse00falsefalsefalsetruefalse34falsefalsefalse00falsefalsefalsetruefalse35falsefalsefalse00falsefalsefalsetruefalse36falsefalsefalse00falsefalsefalsetruefalse37falsefalsefalse00falsefalsefalsetruefalse38falsefalsefalse00falsefalsefalsetruefalse39falsefalsefalse00falsefalsefalsetruefalse40falsefalsefalse00falsefalsefalsetruefalse41falsefalsefalse00falsefalsefalsetruefalse42falsefalsefalse00falsefalsefalsetruefalse43falsefalsefalse00falsefalsefalsetruefalse44falsefalsefalse00falsefalsefalsetruefalse45falsefalsefalse00falsefalsefalsetruefalse46falsefalsefalse00falsefalsefalsetruefalse47falsefalsefalse00falsefalsefalsetruefalse48falsefalsefalse00falsefalsefalsetruefalse49falsefalsefalse00falsefalsefalsetruefalse50falsefalsefalse00falsefalsefalsetruefalse51falsefalsefalse00falsefalsefalsetruefalse52falsefalsefalse00falsefalsefalsetruefalse53falsefalsefalse00falsefalsefalsetruefalse54falsefalsefalse00falsefalsefalsetruefalse55falsefalsefalse00falsefalsefalsetruefalse56falsefalsefalse00falsefalsefalsetruefalse57falsefalsefalse00falsefalsefalsetruefalse58falsefalsefalse00falsefalsefalsetruefalse59falsefalsefalse00falsefalsefalsetruefalse60falsefalsefalse00falsefalsefalsetruefalse61falsefalsefalse00falsefalsefalsetruefalse62falsefalsefalse00falsefalsefalsetruefalse63falsefalsefalse00falsefalsefalsetruefalse64falsefalsefalse00falsefalsefalsetruefalse65falsefalsefalse00falsefalsefalsetruefalse66falsefalsefalse00falsefalsefalsetruefalse67falsefalsefalse00falsefalsefalsetruefalse68falsefalsefalse00falsefalsefalsetruefalse69falsefalsefalse00falsefalsefalsetruefalse70falsefalsefalse00falsefalsefalsetruefalse71falsefalsefalse00falsefalsefalsetruefalse72falsefalsefalse00falsefalsefalsetruefalse73falsefalsefalse00falsefalsefalsetruefalse74falsefalsefalse00falsefalsefalsetruefalse75falsefalsefalse00falsefalsefalsetruefalse76falsefalsefalse00falsefalsefalsetruefalse77falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain or loss on that instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44D -Subparagraph b falsefalseDerivative, Net Liability Position, Aggregate Fair Value30false0us-gaap_AdditionalCollateralAggregateFairValueus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse50000005falsetruefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6falsefalsefalse00falsefalsefalsetruefalse7falsefalsefalse00falsefalsefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9falsefalsefalse00falsefalsefalsetruefalse10falsefalsefalse00falsefalsefalsetruefalse11truefalsefalse20000002falsetruefalsetruefalse12falsefalsefalse00falsefalsefalsetruefalse13falsefalsefalse00falsefalsefalsetruefalse14falsefalsefalse00falsefalsefalsetruefalse15falsefalsefalse00falsefalsefalsetruefalse16falsefalsefalse00falsefalsefalsetruefalse17falsefalsefalse00falsefalsefalsetruefalse18falsefalsefalse00falsefalsefalsetruefalse19falsefalsefalse00falsefalsefalsetruefalse20falsefalsefalse00falsefalsefalsetruefalse21falsefalsefalse00falsefalsefalsetruefalse22falsefalsefalse00falsefalsefalsetruefalse23falsefalsefalse00falsefalsefalsetruefalse24falsefalsefalse00falsefalsefalsetruefalse25falsefalsefalse00falsefalsefalsetruefalse26falsefalsefalse00falsefalsefalsetruefalse27falsefalsefalse00falsefalsefalsetruefalse28falsefalsefalse00falsefalsefalsetruefalse29falsefalsefalse00falsefalsefalsetruefalse30falsefalsefalse00falsefalsefalsetruefalse31falsefalsefalse00falsefalsefalsetruefalse32falsefalsefalse00falsefalsefalsetruefalse33falsefalsefalse00falsefalsefalsetruefalse34falsefalsefalse00falsefalsefalsetruefalse35falsefalsefalse00falsefalsefalsetruefalse36falsefalsefalse00falsefalsefalsetruefalse37falsefalsefalse00falsefalsefalsetruefalse38falsefalsefalse00falsefalsefalsetruefalse39falsefalsefalse00falsefalsefalsetruefalse40falsefalsefalse00falsefalsefalsetruefalse41falsefalsefalse00falsefalsefalsetruefalse42falsefalsefalse00falsefalsefalsetruefalse43falsefalsefalse00falsefalsefalsetruefalse44falsefalsefalse00falsefalsefalsetruefalse45falsefalsefalse00falsefalsefalsetruefalse46falsefalsefalse00falsefalsefalsetruefalse47falsefalsefalse00falsefalsefalsetruefalse48falsefalsefalse00falsefalsefalsetruefalse49falsefalsefalse00falsefalsefalsetruefalse50falsefalsefalse00falsefalsefalsetruefalse51falsefalsefalse00falsefalsefalsetruefalse52falsefalsefalse00falsefalsefalsetruefalse53falsefalsefalse00falsefalsefalsetruefalse54falsefalsefalse00falsefalsefalsetruefalse55falsefalsefalse00falsefalsefalsetruefalse56falsefalsefalse00falsefalsefalsetruefalse57falsefalsefalse00falsefalsefalsetruefalse58falsefalsefalse00falsefalsefalsetruefalse59falsefalsefalse00falsefalsefalsetruefalse60falsefalsefalse00falsefalsefalsetruefalse61falsefalsefalse00falsefalsefalsetruefalse62falsefalsefalse00falsefalsefalsetruefalse63falsefalsefalse00falsefalsefalsetruefalse64falsefalsefalse00falsefalsefalsetruefalse65falsefalsefalse00falsefalsefalsetruefalse66falsefalsefalse00falsefalsefalsetruefalse67falsefalsefalse00falsefalsefalsetruefalse68falsefalsefalse00falsefalsefalsetruefalse69falsefalsefalse00falsefalsefalsetruefalse70falsefalsefalse00falsefalsefalsetruefalse71falsefalsefalse00falsefalsefalsetruefalse72falsefalsefalse00falsefalsefalsetruefalse73falsefalsefalse00falsefalsefalsetruefalse74falsefalsefalse00falsefalsefalsetruefalse75falsefalsefalse00falsefalsefalsetruefalse76falsefalsefalse00falsefalsefalsetruefalse77falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44D -Subparagraph c falsefalseAdditional Collateral Aggregate Fair Value1Million British thermal units2Megawatt hours3Includes Otay Mesa VIE. All of SDG&E's interest rate derivatives relate to Otay Mesa VIE.4Included in Current Assets: Other for SoCalGas.5Included in Current Liabilities: Other for SoCalGas.6Includes Otay Mesa VIE. All of SDG&E's amounts relate to Otay Mesa VIE.7Amount for 2010 related to Otay Mesa VIE. Sempra Energy Consolidated also includes additional instruments.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.9Amounts include Otay Mesa VIE. All of SDG&E's interest rate derivative activity relates to Otay Mesa VIE.7729DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue