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No authoritative reference available. false 19 Regulatory Recovery, Deductible Per Event 2 sre_RegulatoryRecoveryDeductiblePerEvent sre false debit instant No definition available. false false false false false false false false false false false false 1 false true false false 5000000 5 false false false 2 false true false false 5000000 5 false false false xbrli:monetaryItemType monetary No definition available. No authoritative reference available. false 20 San Diego Gas and Electric Company | Sunrise Powerlink 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresemprautilitiesregulatorymattersdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false false 3 USD true false false false San Diego Gas and Electric Company dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi sre_SanDiegoGasAndElectricCompanyAndSubsidiaryMember dei_LegalEntityAxis explicitMember false false Sunrise Powerlink sre_UtilityProjectsByProjectNameAxis xbrldi http://xbrl.org/2006/xbrldi sre_SunrisePowerlinkMember sre_UtilityProjectsByProjectNameAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 21 Schedule Of Utility Projects [Line Items] 2 sre_ScheduleOfUtilityProjectsLineItems sre false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 22 Estimated Project Cost, Maximum 2 sre_EstimatedProjectCostMaximum sre false debit instant No definition available. false false false false false false false false false false false false 1 false true false false 1900000000 1900 false false false 2 false false false false 0 0 false false false xbrli:monetaryItemType monetary No definition available. No authoritative reference available. false 25 Environmental Mitigation Costs Included In Estimated Project Cost 2 sre_EnvironmentalMitigationCostsIncludedInEstimatedProjectCost sre false debit instant No definition available. false false false false false false false false false false false false 1 false true false false 190000000 190 false false false 2 false false false false 0 0 false false false xbrli:monetaryItemType monetary No definition available. No authoritative reference available. false 26 Project To Date Expenditures 2 sre_ProjectToDateExpenditures sre false debit duration No definition available. false false false false false false false false false false false false 1 false true false false 366000000 366 false false false 2 false false false false 0 0 false false false xbrli:monetaryItemType monetary No definition available. No authoritative reference available. false 39 San Diego Gas and Electric Company | Solar Photovoltaic Program 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresemprautilitiesregulatorymattersdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false false 4 USD true false false false San Diego Gas and Electric Company dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi sre_SanDiegoGasAndElectricCompanyAndSubsidiaryMember dei_LegalEntityAxis explicitMember false false Solar Photovoltaic Program sre_UtilityProjectsByProjectNameAxis xbrldi http://xbrl.org/2006/xbrldi sre_SolarPhotovoltaicProgramMember sre_UtilityProjectsByProjectNameAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 40 Schedule Of Utility Projects [Line Items] 2 sre_ScheduleOfUtilityProjectsLineItems sre false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 41 Estimated Project Cost, Maximum 2 sre_EstimatedProjectCostMaximum sre false debit instant No definition available. false false false false false false false false false false false false 1 false true false false 250000000 250 false false false 2 false false false false 0 0 false false false xbrli:monetaryItemType monetary No definition available. 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No authoritative reference available. false 58 San Diego Gas and Electric Company | East County Substation 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresemprautilitiesregulatorymattersdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false false 5 USD true false false false San Diego Gas and Electric Company dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi sre_SanDiegoGasAndElectricCompanyAndSubsidiaryMember dei_LegalEntityAxis explicitMember false false East County Substation sre_UtilityProjectsByProjectNameAxis xbrldi http://xbrl.org/2006/xbrldi sre_EastCountySubstationMember sre_UtilityProjectsByProjectNameAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 59 Schedule Of Utility Projects [Line Items] 2 sre_ScheduleOfUtilityProjectsLineItems sre false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 60 Estimated Project Cost, Maximum 2 sre_EstimatedProjectCostMaximum sre false debit instant No definition available. false false false false false false false false false false false false 1 false true false false 270000000 270 false false false 2 false false false false 0 0 false false false xbrli:monetaryItemType monetary No definition available. No authoritative reference available. false 77 San Diego Gas and Electric Company | Wind Farm Project 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresemprautilitiesregulatorymattersdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false false 6 USD true false false false San Diego Gas and Electric Company dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi sre_SanDiegoGasAndElectricCompanyAndSubsidiaryMember dei_LegalEntityAxis explicitMember false false Wind Farm Project sre_UtilityProjectsByProjectNameAxis xbrldi http://xbrl.org/2006/xbrldi sre_WindFarmProjectMember sre_UtilityProjectsByProjectNameAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 78 Schedule Of Utility Projects [Line Items] 2 sre_ScheduleOfUtilityProjectsLineItems sre false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 79 Estimated Project Cost, Maximum 2 sre_EstimatedProjectCostMaximum sre false debit instant No definition available. false false false false false false false false false false false false 1 false true false false 600000000 600 false false false 2 false false false false 0 0 false false false xbrli:monetaryItemType monetary No definition available. No authoritative reference available. false 84 Investment As Percentage Of Total Estimated Project Cost 2 sre_InvestmentAsPercentageOfTotalEstimatedProjectCost sre false na instant No definition available. false false false false false false false false false false false false 1 false true false false 80 80 false false false 2 false false false false 0 0 false false false us-types:percentItemType pure No definition available. No authoritative reference available. false 96 Southern California Gas Company and Subsidiaries 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresemprautilitiesregulatorymattersdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false false 7 USD true false false false Southern California Gas Company and Subsidiaries dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi sre_SouthernCaliforniaGasCompanyMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 8 USD true false false false Southern California Gas Company and Subsidiaries dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi sre_SouthernCaliforniaGasCompanyMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. 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No authoritative reference available. false 115 Southern California Gas Company and Subsidiaries | Advanced Metering Infrastructure 0 na true na na No definition available. false true false false false false false false false false false http://www.sempra.com/role/disclosuresemprautilitiesregulatorymattersdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false false 9 USD true false false false Southern California Gas Company and Subsidiaries dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi sre_SouthernCaliforniaGasCompanyMember dei_LegalEntityAxis explicitMember false false Advanced Metering Infrastructure sre_UtilityProjectsByProjectNameAxis xbrldi http://xbrl.org/2006/xbrldi sre_AdvancedMeteringInfrastructureMember sre_UtilityProjectsByProjectNameAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. 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