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DEBT AND CREDIT FACILITIES - CALLABLE LONG-TERM DEBT (Details) $ in Millions | Dec. 31, 2018 USD ($)
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Schedule Of Callable Long-term Debt [Line Items] |
Callable long-term debt, not subject to make-whole provisions | $ 976
Callable long-term debt, subject to make-whole provisions | 18,254
San Diego Gas and Electric Company [Member] |
Schedule Of Callable Long-term Debt [Line Items] |
Callable long-term debt, not subject to make-whole provisions | 251
Callable long-term debt, subject to make-whole provisions | 4,525
Southern California Gas Company [Member] |
Schedule Of Callable Long-term Debt [Line Items] |
Callable long-term debt, not subject to make-whole provisions | 4
Callable long-term debt, subject to make-whole provisions | 3,455
Other Sempra Energy [Member] |
Schedule Of Callable Long-term Debt [Line Items] |
Callable long-term debt, not subject to make-whole provisions | 721
Callable long-term debt, subject to make-whole provisions | $ 10,274

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- Definition Callable long-term debt. + References No definition available. + Details
Name: | sre_CallableLongTermDebt
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Callable long-term debt subject to make whole provisions. + References No definition available. + Details
Name: | sre_CallableLongTermDebtSubjectToMakeWholeProvisions
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

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

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