v2.4.1.9

CALIFORNIA UTILITIES' REGULATORY MATTERS - SCHEDULE OF REGULATORY AMOUNTS 1 (Details) (Year 2016 [Member], USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Mar. 31, 2015 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
San Diego Gas and Electric Company [Member] |  |  |  |
General Rate Case [Line Items] |  |  |  |
General Rate Case, Revenue Requirement, Revised Request | $ 1,905 sre_GeneralRateCaseRevenueRequirementRevisedRequest / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |
General Rate Case, Revenue Requirement Increase, Original Request | 133 us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |
General Rate Case, Revenue Requirement Increase, Revised Request | 111 us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedAmount / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  | 111 us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedAmount / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember
General Rate Case, Revenue Requirement Percentage Increase, Revised Request | 6.00%us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedPercentage / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |
General Rate Case, Revised Request Decrease Compared To Original | 6 sre_GeneralRateCaseRevisedRequestComparedToOriginal / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |
General Rate Case, Proposed Revenue Requirement Increase (Decrease) |  | 63 sre_GeneralRateCaseProposedRevenueRequirementIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | 61 sre_GeneralRateCaseProposedRevenueRequirementIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | (62)sre_GeneralRateCaseProposedRevenueRequirementIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember
General Rate Case, Proposed Revenue Requirement Percentage Increase (Decrease) |  | 3.50%sre_GeneralRateCaseProposedRevenueRequirementPercentageIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | 3.50%sre_GeneralRateCaseProposedRevenueRequirementPercentageIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | (3.50%)sre_GeneralRateCaseProposedRevenueRequirementPercentageIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember
General Rate Case, Adjustment To Decrease Estimated Revenue Requirement | 16 sre_GeneralRateCaseAdjustment / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  |
Southern California Gas Company [Member] |  |  |  |
General Rate Case [Line Items] |  |  |  |
General Rate Case, Revenue Requirement, Revised Request | 2,342 sre_GeneralRateCaseRevenueRequirementRevisedRequest / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |  |  |
General Rate Case, Revenue Requirement Increase, Original Request | 256 us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |  |  |
General Rate Case, Revenue Requirement Increase, Revised Request | 246 us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedAmount / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |  |  | 246 us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedAmount / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember
General Rate Case, Revenue Requirement Percentage Increase, Revised Request | 12.00%us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedPercentage / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |  |  |
General Rate Case, Revised Request Decrease Compared To Original | 10 sre_GeneralRateCaseRevisedRequestComparedToOriginal / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |  |  |
General Rate Case, Proposed Revenue Requirement Increase (Decrease) |  | $ 78 sre_GeneralRateCaseProposedRevenueRequirementIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember | $ 76 sre_GeneralRateCaseProposedRevenueRequirementIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember | $ 70 sre_GeneralRateCaseProposedRevenueRequirementIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember
General Rate Case, Proposed Revenue Requirement Percentage Increase (Decrease) |  | 3.50%sre_GeneralRateCaseProposedRevenueRequirementPercentageIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember | 3.50%sre_GeneralRateCaseProposedRevenueRequirementPercentageIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember | 3.30%sre_GeneralRateCaseProposedRevenueRequirementPercentageIncreaseDecrease / sre_GrcYearAxis = sre_Year2016Member / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember

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