2.2.0.25truefalse041010 - Disclosure - COMMITMENTS AND CONTINGENCIES - NUCLEAR INSURANCE (Details)truefalsefalse1falsefalseUSDtruefalse{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$2true0sre_ScheduleOfNuclearInsuranceLineItemssrefalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSchedule Of Nuclear Insurance [Line Items]3false0sre_NuclearLiabilityInsuranceCoverageMaximumsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse375000000375000000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseNuclear Liability Insurance Coverage, Maximum4false0sre_SecondaryFinancialProtectionMaximumsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1220000000012200000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseSecondary Financial Protection, Maximum5false0sre_SecondaryFinancialProtectionCompanyContributionMaximumsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse4700000047000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseSecondary Financial Protection, Company Contribution, Maximum6false0sre_SecondaryFinancialProtectionCompanyContributionAnnualMaximumsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse70000007000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseSecondary Financial Protection, Company Contribution, Annual Maximum7false0sre_NuclearPropertyInsuranceCoverageMaximumsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse27500000002750000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseNuclear Property Insurance Coverage, Maximum8false0sre_NuclearPropertyDamageInsuranceCoverageMaximumsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse490000000490000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseNuclear Property Damage Insurance Coverage, Maximum9false0sre_NuclearPropertyDamageInsuranceCoverageWeeklyMaximumsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse35000003500000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseNuclear Property Damage Insurance Coverage, Weekly Maximum10false0sre_NuclearPropertyDamageInsuranceCoverageWeeklyMinimumsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse28000002800000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseNuclear Property Damage Insurance Coverage, Weekly Minimum11false0sre_NuclearPropertyDamageInsurancePremiumAssessmentsrefalsecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse85000008500000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseNuclear Property Damage Insurance, Premium Assessment12false0sre_NuclearPropertyInsuranceTerrorismCoverageMaximumsrefalsedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse32400000003240000000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryNo definition available.No authoritative reference available.falsefalseNuclear Property Insurance Terrorism Coverage, Maximum111COMMITMENTS AND CONTINGENCIES - NUCLEAR INSURANCE (Details) (San Diego Gas and Electric Company and Subsidiary [Member], USD $)NoRoundingUnKnownUnKnownUnKnownfalsetrue