Name:	sre_BankGuarantee
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Committed lines of credit, capacity for issuance of letters of credit.

No definition available.

Name:	sre_LineOfCreditFacilityLettersOfCreditCapacity
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Committed lines of credit, maximum ratio of debt to equity.

No definition available.

Name:	sre_LineOfCreditFacilityMaximumRatioOfDebtToEquity
Namespace Prefix:	sre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Committed lines of credit, maximum ratio of indebtedness to total capitalization.

No definition available.

Name:	sre_LineOfCreditFacilityMaximumRatioOfIndebtednessToTotalCapitalization
Namespace Prefix:	sre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Line of Credit Facility, Adjustment to Borrowing Limit

No definition available.

Name:	sre_LineofCreditFacilityAdjustmenttoBorrowingLimit
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Line of Credit Facility, Available Unused Credit Limit Reduction

No definition available.

Name:	sre_LineofCreditFacilityAvailableUnusedCreditLimitReduction
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Line of Credit Facility, Borrowing Limit Adjustment

No definition available.

Name:	sre_LineofCreditFacilityBorrowingLimitAdjustment
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Line of Credit Facility, Borrowing Limit Reduction

No definition available.

Name:	sre_LineofCreditFacilityBorrowingLimitReduction
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Line of Credit Facility, Increase in Borrowing Capacity

No definition available.

Name:	sre_LineofCreditFacilityIncreaseinBorrowingCapacity
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Number of Primary Lines of Credit

No definition available.

Name:	sre_NumberofPrimaryLinesofCredit
Namespace Prefix:	sre_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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.

No definition available.

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Weighted average interest rate of short-term debt outstanding calculated at point in time.

Name:	us-gaap_ShortTermDebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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Namespace Prefix:
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Balance Type:
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Name:	dei_LegalEntityAxis=sre_SempraU.S.BusinessesMember
Namespace Prefix:
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Name:	dei_LegalEntityAxis=sre_SouthAmericanUtilitiesandMexicoCombinedMember
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Name:	dei_LegalEntityAxis=sre_SempraEnergyMember
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Name:	dei_LegalEntityAxis=sre_SempraGlobalMember
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Data Type:	na
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Name:	dei_LegalEntityAxis=sre_CaliforniaUtilitiesCombinedMember
Namespace Prefix:
Data Type:	na
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Name:	dei_LegalEntityAxis=sre_SanDiegoGasAndElectricCompanyMember
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Name:	dei_LegalEntityAxis=sre_SouthernCaliforniaGasCompanyMember
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Name:	dei_LegalEntityAxis=sre_SempraSouthAmericanUtilitiesMember
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Name:	srt_StatementGeographicalAxis=country_PE
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Name:	srt_StatementGeographicalAxis=country_CL
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Name:	dei_LegalEntityAxis=sre_SempraMexicoMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_CommercialPaperMember
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