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

No definition available.

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

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Line of Credit Facility, Available Unused Credit Limit Reduction

+ References

No definition available.

+ Details

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

- Definition

Line of Credit Facility, Borrowing Limit Reduction

+ References

No definition available.

+ Details

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

- Definition

Number of Lenders

+ References

No definition available.

+ Details

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Namespace Prefix:	sre_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

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

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

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.

+ References

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

+ Details

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

- 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

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

- Definition

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.

+ References

+ Details

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

- Definition

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

+ References

+ Details

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

- Details

Name:	dei_LegalEntityAxis=sre_SempraU.S.BusinessesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sre_SempraEnergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sre_SempraGlobalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sre_CaliforniaUtilitiesCombinedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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DEBT AND CREDIT FACILITIES - LINES OF CREDIT (Details)		1 Months Ended	12 Months Ended
DEBT AND CREDIT FACILITIES - LINES OF CREDIT (Details)	Apr. 11, 2019 USD ($)	Feb. 28, 2019 USD ($) lender	Dec. 31, 2018 USD ($) lender	Mar. 31, 2019 USD ($)
Line of Credit Facility [Line Items]
Standby letters of credit outstanding				$ 611,000,000
Sempra U.S. Businesses [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				5,435,000,000
Available unused credit				$ 3,718,000,000
Maximum ratio of indebtedness to total capitalization				65.00%
Sempra Energy [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 1,250,000,000
Available unused credit				1,250,000,000
Capacity for issuance of letters of credit				400,000,000
Sempra Global [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				3,185,000,000
Available unused credit				1,896,000,000
California Utilities Combined [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				1,000,000,000
Limit on facility borrowings				(500,000,000)
Available unused credit				572,000,000
Limit on borrowings available				(500,000,000)
Capacity for issuance of letters of credit				250,000,000
San Diego Gas and Electric Company [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				750,000,000
Available unused credit				$ 512,000,000
Maximum ratio of indebtedness to total capitalization				65.00%
Southern California Gas Company [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 750,000,000
Available unused credit				$ 560,000,000
Maximum ratio of indebtedness to total capitalization				65.00%
Sempra Mexico [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 1,500,000,000	$ 1,170,000,000
Available unused credit				$ 692,000,000
Term of debt instrument		5 years
Number of lenders \| lender		10	8
Commercial Paper [Member] \| Sempra U.S. Businesses [Member]
Line of Credit Facility [Line Items]
Amount outstanding				(1,717,000,000)
Commercial Paper [Member] \| Sempra Energy [Member]
Line of Credit Facility [Line Items]
Amount outstanding				0
Commercial Paper [Member] \| Sempra Global [Member]
Line of Credit Facility [Line Items]
Amount outstanding				(1,289,000,000)
Unamortized debt discount				2,000,000
Commercial Paper [Member] \| California Utilities Combined [Member]
Line of Credit Facility [Line Items]
Amount outstanding				(428,000,000)
Limit on facility borrowings				0
Commercial Paper [Member] \| San Diego Gas and Electric Company [Member]
Line of Credit Facility [Line Items]
Amount outstanding				(238,000,000)
Commercial Paper [Member] \| Southern California Gas Company [Member]
Line of Credit Facility [Line Items]
Amount outstanding				$ (190,000,000)
Subsequent Event [Member] \| Sempra Mexico [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 100,000,000
Term of debt instrument	3 years