v3.6.0.2

DERIVATIVE FINANCIAL INSTRUMENTS - NOTIONALS AMOUNTS (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Jan. 31, 2017
Cash Flow Hedging [Member] | Interest rate instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Notional amount of derivative liability | $ 924 | $ 384 |
Fair Value Hedging [Member] | Interest rate instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Maturity Date |  | Dec. 31, 2016 |
Notional amount of derivative liability | 0 | $ 300 |
Sempra Mexico [Member] | Cross-currency swaps [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Notional amount of derivative liability | 408 | 408 |
Sempra Mexico [Member] | Other foreign currency derivatives [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Notional amount of derivative liability | $ 86 | $ 0 |
Minimum [Member] | Cash Flow Hedging [Member] | Interest rate instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Maturity Date | Dec. 31, 2017 | Dec. 31, 2016 |
Minimum [Member] | Sempra Mexico [Member] | Cross-currency swaps [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Maturity Date | Dec. 31, 2017 | Dec. 31, 2016 |
Minimum [Member] | Sempra Mexico [Member] | Other foreign currency derivatives [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Maturity Date | Dec. 31, 2017 |  |
Maximum [Member] | Cash Flow Hedging [Member] | Interest rate instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Maturity Date | Dec. 31, 2032 | Dec. 31, 2028 |
Maximum [Member] | Sempra Mexico [Member] | Cross-currency swaps [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Maturity Date | Dec. 31, 2023 | Dec. 31, 2023 |
Maximum [Member] | Sempra Mexico [Member] | Other foreign currency derivatives [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Maturity Date | Dec. 31, 2018 |  |
Subsequent Event [Member] | Other foreign currency derivatives [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Notional amount of derivative liability |  |  | $ 750
San Diego Gas and Electric Company [Member] | Cash Flow Hedging [Member] | Interest rate instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Notional amount of derivative liability | $ 305 | $ 315 |
San Diego Gas and Electric Company [Member] | Minimum [Member] | Cash Flow Hedging [Member] | Interest rate instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Maturity Date | Dec. 31, 2017 | Dec. 31, 2016 |
San Diego Gas and Electric Company [Member] | Maximum [Member] | Cash Flow Hedging [Member] | Interest rate instruments [Member] |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Derivative, Maturity Date | Dec. 31, 2019 | Dec. 31, 2019 |

X
- Definition Nominal or face amount used to calculate payments on the derivative liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeLiabilityNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DerivativeMaturityDates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
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_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sre_SempraMexicoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CrossCurrencyInterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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