v2.4.1.9

DERIVATIVE FINANCIAL INSTRUMENTS 6 (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Derivative Credit Risk Related Contingent Features [Line Items] |  |
Derivative, Net Liability Position, Aggregate Fair Value | $ 7 us-gaap_DerivativeNetLiabilityPositionAggregateFairValue | $ 9 us-gaap_DerivativeNetLiabilityPositionAggregateFairValue
Additional Collateral Aggregate Fair Value | 7 us-gaap_AdditionalCollateralAggregateFairValue |
San Diego Gas and Electric Company [Member] |  |
Derivative Credit Risk Related Contingent Features [Line Items] |  |
Derivative, Net Liability Position, Aggregate Fair Value | 4 us-gaap_DerivativeNetLiabilityPositionAggregateFairValue / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember | 2 us-gaap_DerivativeNetLiabilityPositionAggregateFairValue / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember
Additional Collateral Aggregate Fair Value | $ 4 us-gaap_AdditionalCollateralAggregateFairValue / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |

X
- Details
Name: | sre_DerivativeCreditRiskRelatedContingentFeaturesLineItems
Namespace Prefix: | sre_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624258-113959 + Details
Name: | us-gaap_AdditionalCollateralAggregateFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624258-113959 + Details
Name: | us-gaap_DerivativeNetLiabilityPositionAggregateFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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