v3.2.0.727

CALIFORNIA UTILITIES' REGULATORY MATTERS - SCHEDULE OF REGULATORY AMOUNTS 1 (Details) - Year 2016 [Member] - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 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 |  |  |
General Rate Case, Revenue Requirement Increase, Original Request | 133 |  |  |
General Rate Case, Revenue Requirement Increase, Revised Request | $ 111 |  |  | $ 111
General Rate Case, Revenue Requirement Percentage Increase, Revised Request | 6.00% |  |  |
General Rate Case, Revised Request Decrease Compared To Original | $ 6 |  |  |
General Rate Case, Proposed Revenue Requirement Increase (Decrease) |  | $ 62 | $ 60 | $ (84)
General Rate Case, Proposed Revenue Requirement Percentage Increase (Decrease) |  | 3.50% | 3.50% | (4.70%)
General Rate Case, Adjustment To Decrease Estimated Revenue Requirement | 16 |  |  |
Southern California Gas Company [Member] |  |  |  |
General Rate Case [Line Items] |  |  |  |
General Rate Case, Revenue Requirement, Revised Request | 2,342 |  |  |
General Rate Case, Revenue Requirement Increase, Original Request | 256 |  |  |
General Rate Case, Revenue Requirement Increase, Revised Request | $ 246 |  |  | $ 246
General Rate Case, Revenue Requirement Percentage Increase, Revised Request | 12.00% |  |  |
General Rate Case, Revised Request Decrease Compared To Original | $ 10 |  |  |
General Rate Case, Proposed Revenue Requirement Increase (Decrease) |  | $ 78 | $ 75 | $ 49
General Rate Case, Proposed Revenue Requirement Percentage Increase (Decrease) |  | 3.50% | 3.50% | 2.30%

X
- Definition General Rate Case, Adjustment. + References No definition available. + Details
Name: | sre_GeneralRateCaseAdjustment
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | sre_GeneralRateCaseLineItems
Namespace Prefix: | sre_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition General Rate Case, Proposed Revenue Requirement Increase (Decrease). + References No definition available. + Details
Name: | sre_GeneralRateCaseProposedRevenueRequirementIncreaseDecrease
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition General Rate Case, Proposed Revenue Requirement Percentage Increase (Decrease). + References No definition available. + Details
Name: | sre_GeneralRateCaseProposedRevenueRequirementPercentageIncreaseDecrease
Namespace Prefix: | sre_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition General Rate Case, Revenue Requirement, Revised Request. + References No definition available. + Details
Name: | sre_GeneralRateCaseRevenueRequirementRevisedRequest
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition General Rate Case, Revised Request Compared To Original. + References No definition available. + Details
Name: | sre_GeneralRateCaseRevisedRequestComparedToOriginal
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of public utility's amended requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of public utility's amended requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of public utility's requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=sre_SanDiegoGasAndElectricCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sre_GrcYearAxis=sre_Year2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=sre_SouthernCaliforniaGasCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |