2.2.0.25truefalse040900 - Disclosure - SEMPRA UTILITIES' REGULATORY MATTERS (Details)truefalsefalse1falsefalseUSDtruefalse{sre_UtilityProjectsByProjectNameAxis} : Wind Farm Project [Member] 3/31/2011 USD ($) $AS_OF_Mar31_2011_sre_UtilityProjectsByProjectNameAxis_WindFarmProjectMemberhttp://www.sec.gov/CIK0001032208instant2011-03-31T00:00:000001-01-01T00:00:00falsefalseWind Farm Project [Member]sre_UtilityProjectsByProjectNameAxisxbrldihttp://xbrl.org/2006/xbrldisre_WindFarmProjectMembersre_UtilityProjectsByProjectNameAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalseUSDtruefalse{dei_LegalEntityAxis} : San Diego Gas and Electric Company and Subsidiary [Member] 3/31/2011 USD ($) $AS_OF_Mar31_2011_dei_LegalEntityAxis_SanDiegoGasAndElectricCompanyAndSubsidiaryMemberhttp://www.sec.gov/CIK0001032208instant2011-03-31T00:00:000001-01-01T00:00:00falsefalseSan Diego Gas and Electric Company and Subsidiary [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SanDiegoGasAndElectricCompanyAndSubsidiaryMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3falsefalseUSDtruefalse{dei_LegalEntityAxis} : Southern California Gas Company [Member] 1/1/2011 - 3/31/2011 USD ($) $FROM_Jan01_2011_TO_Mar31_2011_dei_LegalEntityAxis_SouthernCaliforniaGasCompanyMemberhttp://www.sec.gov/CIK0001032208duration2011-01-01T00:00:002011-03-31T00:00:00falsefalseSouthern California Gas Company [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldisre_SouthernCaliforniaGasCompanyMemberdei_LegalEntityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0sre_ScheduleOfUtilityProjectsLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSchedule Of Utility Projects [Line Items]3false0sre_EstimatedProjectCostMaximumsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse250000000250000000falsetruefalsetruefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseEstimated Project Cost, Maximum4false0sre_InvestmentAsPercentageOfTotalEstimatedProjectCostsrefalsenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.64990.6499falsefalsefalsetruefalse2falsetruefalse00falsefalsefalsetruefalse3falsetruefalse00falsefalsefalsetruefalseOtherus-types:percentItemTypepureNo definition available.No authoritative reference available.falsefalseInvestment As Percentage Of Total Estimated Project Cost5true0sre_ScheduleOfRegulatoryAmountsLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSchedule Of Regulatory Amounts [Line Items]6false0sre_RenewablePortfolioStandardsPenaltyPerKilowattHourOfRenewableEnergyUnderdeliverysrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsetruefalse2truefalsefalse0.050.05falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseRenewable Portfolio Standards, Penalty Per Kilowatt Hour Of Renewable Energy Underdelivery7false0sre_UnrecordedGasCostIncentiveMechanismAwardsrefalsecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsetruefalse3truefalsefalse60000006000000falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseUnrecorded Gas Cost Incentive Mechanism Award8false0sre_RecognizedEnergyEfficiencyIncentiveMechanismAwardsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsetruefalse3truefalsefalse1200000012000000falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseRecognized Energy Efficiency Incentive Mechanism Award9false0sre_RegulatoryRecoveryDeductiblePerEventsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsetruefalse2truefalsefalse50000005000000falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseRegulatory Recovery, Deductible Per Event10false0sre_IncrementalInsuranceCostsIncurredRelatedToCatastrophe20092010srefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsetruefalse2truefalsefalse2900000029000000falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseIncremental insurance costs incurred related to catastrophe for 2009-2010 policy period11false0sre_IncrementalInsuranceCostsIncurredRelatedToCatastrophe20102011srefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00falsefalsefalsetruefalse2truefalsefalse6300000063000000falsetruefalsetruefalse3falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseIncremental insurance costs incurred related to catastrophe for 2010-2011 policy period310SEMPRA UTILITIES' REGULATORY MATTERS (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruetrue