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FAIR VALUE MEASUREMENTS 4 (Details) (USD $) In Millions, unless otherwise specified
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Mar. 31, 2015
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Dec. 31, 2014
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| Carrying Amount |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
$ 13,176us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
[1],[2] |
$ 12,347us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
[1],[2] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
20sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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20sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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| Debt Instrument Unamortized Discount |
23us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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21us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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| Capital Lease Obligations |
336us-gaap_CapitalLeaseObligations / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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310us-gaap_CapitalLeaseObligations / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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| Debt Instrument Carrying Amount |
322us-gaap_DebtInstrumentCarryingAmount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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325us-gaap_DebtInstrumentCarryingAmount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember |
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| Carrying Amount | San Diego Gas and Electric Company [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
4,849us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
4,461us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
| Debt Instrument Unamortized Discount |
12us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
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11us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
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| Capital Lease Obligations |
232us-gaap_CapitalLeaseObligations / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
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234us-gaap_CapitalLeaseObligations / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
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| Debt Instrument Carrying Amount |
322us-gaap_DebtInstrumentCarryingAmount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
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325us-gaap_DebtInstrumentCarryingAmount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
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| Carrying Amount | Southern California Gas Company [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
1,913us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
1,913us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
22sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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22sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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| Debt Instrument Unamortized Discount |
7us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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8us-gaap_DebtInstrumentUnamortizedDiscount / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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| Capital Lease Obligations |
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1us-gaap_CapitalLeaseObligations / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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| Fair Value |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
14,784us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
[1],[2] |
13,699us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
[1],[2] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
23sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
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23sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
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| Fair Value | Level 1 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
0us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
[1],[2] |
0us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
[1],[2] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
0sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
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0sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
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| Fair Value | Level 2 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
13,889us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
[1],[2] |
12,782us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
[1],[2] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
23sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
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23sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
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| Fair Value | Level 3 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
895us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
[1],[2] |
917us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
[1],[2] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
0sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
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0sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
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| Fair Value | San Diego Gas and Electric Company [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
5,483us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
4,988us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
| Fair Value | San Diego Gas and Electric Company [Member] | Level 1 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
0us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
0us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
| Fair Value | San Diego Gas and Electric Company [Member] | Level 2 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
5,061us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
4,563us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
| Fair Value | San Diego Gas and Electric Company [Member] | Level 3 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
422us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
425us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
[1],[3] |
| Fair Value | Southern California Gas Company [Member] |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
2,167us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
2,124us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
25sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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25sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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| Fair Value | Southern California Gas Company [Member] | Level 1 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
0us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
0us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
0sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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0sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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| Fair Value | Southern California Gas Company [Member] | Level 2 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
2,167us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
2,124us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
25sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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25sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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| Fair Value | Southern California Gas Company [Member] | Level 3 |
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
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| Fair value of financial instruments, Total long-term debt |
0us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
0us-gaap_NotesPayableFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
[4] |
| Preferred Stock Of Subsidiaries Fair Value Disclosure |
$ 0sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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$ 0sre_PreferredStockOfSubsidiariesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
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