v2.4.1.9
COMMITMENTS AND CONTINGENCIES - NUCLEAR INSURANCE (Details) (San Diego Gas and Electric Company [Member], USD $)
Mar. 31, 2015
San Diego Gas and Electric Company [Member]
  
Schedule Of Nuclear Insurance [Line Items]  
Nuclear Liability Insurance Coverage, Maximum $ 375,000,000sre_NuclearLiabilityInsuranceCoverageMaximum
/ dei_LegalEntityAxis
= sre_SanDiegoGasAndElectricCompanyMember
Secondary Financial Protection, Maximum 13,200,000,000sre_SecondaryFinancialProtectionMaximum
/ dei_LegalEntityAxis
= sre_SanDiegoGasAndElectricCompanyMember
Secondary Financial Protection, Company Contribution, Maximum 50,930,000sre_SecondaryFinancialProtectionCompanyContributionMaximum
/ dei_LegalEntityAxis
= sre_SanDiegoGasAndElectricCompanyMember
Secondary Financial Protection, Company Contribution, Annual Maximum 7,600,000sre_SecondaryFinancialProtectionCompanyContributionAnnualMaximum
/ dei_LegalEntityAxis
= sre_SanDiegoGasAndElectricCompanyMember
Nuclear Property Insurance Coverage, Maximum 2,750,000,000sre_NuclearPropertyInsuranceCoverageMaximum
/ dei_LegalEntityAxis
= sre_SanDiegoGasAndElectricCompanyMember
Nuclear Property Damage Insurance, Premium Assessment 9,700,000sre_NuclearPropertyDamageInsurancePremiumAssessment
/ dei_LegalEntityAxis
= sre_SanDiegoGasAndElectricCompanyMember
Nuclear Property Insurance Terrorism Coverage, Maximum 3,240,000,000sre_NuclearPropertyInsuranceTerrorismCoverageMaximum
/ dei_LegalEntityAxis
= sre_SanDiegoGasAndElectricCompanyMember
Nuclear Property Insurance, Deductible Per Event $ 2,500,000sre_NuclearPropertyInsuranceDeductiblePerEvent
/ dei_LegalEntityAxis
= sre_SanDiegoGasAndElectricCompanyMember