XML 103 R78.htm IDEA: XBRL DOCUMENT
v3.19.1

SAN ONOFRE NUCLEAR GENERATING STATION (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Jan. 31, 2019
Jointly Owned Utility Plant Interests [Line Items] |  |
Anticipated term of dismantlement work | 10 years |
San Diego Gas and Electric Company [Member] |  |
Jointly Owned Utility Plant Interests [Line Items] |  |
Percent of dismantlement work expense | 20.00% |
Nuclear decommissioning trust authorized withdrawal amount | $ 455 | $ 93
ARO related to decommissioning costs | 620 |
Cost study estimate decommissioning escalated | $ 810 |
Jointly Owned Nuclear Power Plant [Member] | San Diego Gas and Electric Company [Member] |  |
Jointly Owned Utility Plant Interests [Line Items] |  |
Jointly owned utility plant, proportionate ownership share | 20.00% |

X
- Definition Authorized Recovery Amount, Nuclear Decommissioning Trust Funding. + References No definition available. + Details
Name: | sre_AuthorizedRecoveryAmountNuclearDecommissioningTrustFunding
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total Estimated Nuclear Decommissioning Costs, Latest Cost Study Escalated. + References No definition available. + Details
Name: | sre_CostStudyEstimateDecommissioningEscalated
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Decommissioning Liability + References No definition available. + Details
Name: | sre_DecommissioningLiability
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Environmental Exit Costs, Anticipated Cost, Percentage + References No definition available. + Details
Name: | sre_EnvironmentalExitCostsAnticipatedCostPercentage
Namespace Prefix: | sre_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Environmental Exit Costs, Anticipated Term + References No definition available. + Details
Name: | sre_EnvironmentalExitCostsAnticipatedTerm
Namespace Prefix: | sre_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_JointlyOwnedUtilityPlantInterestsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportionate share of interest (percent) in a jointly owned utility plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -URI http://asc.fasb.org/extlink&oid=115995737&loc=d3e659983-123033 + Details
Name: | us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_JointlyOwnedUtilityPlantAxis=us-gaap_JointlyOwnedNuclearPowerPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |