Debt Instrument, Face Amount, Per Note

No definition available.

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

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

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

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

- Definition

Contractual interest rate for funds borrowed, under the debt 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(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

+ Details

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

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromDebtNetOfIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

+ Details

Name:	us-gaap_ProceedsFromRepaymentsOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=sre_JuniorSubordinatedNotesDue2079Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=sre_VariableRateLoan.DueAugust2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=sre_FirstMortgageBondsDueJune2050Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	sre_RedemptionTermAxis=sre_OnOrAfterOctober12024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	sre_RedemptionTermAxis=sre_BeforeOctober12024AmendedTaxRegulationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	sre_RedemptionTermAxis=sre_BeforeOctober12024EquityCreditMethodologyUpdateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_BondsMember
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:	us-gaap_DebtInstrumentAxis=sre_FirstMortgageBondsDueJune2049Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT AND CREDIT FACILITIES - LONG-TERM DEBT (Details) - USD ($)		1 Months Ended
	Aug. 14, 2019	Jun. 30, 2019	May 31, 2019	Sep. 30, 2019
Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Par value of each note		$ 25
Otay Mesa VIE [Member] \| Variable-Rate Loan. Due August 2024 [Member]
Debt Instrument [Line Items]
Repayments of variable-rate loan	$ 211,000,000
Southern California Gas Company [Member] \| First Mortgage Bonds, Due June 2050 [Member]
Debt Instrument [Line Items]
Stated rate of debt		3.95%		3.95%
Junior Subordinated Debt [Member] \| Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Debt amount		$ 758,000,000
Stated rate of debt		5.75%		5.75%
Net proceeds of debt		$ 735,000,000
Debt issuance costs		$ 23,000,000
Junior Subordinated Debt [Member] \| On Or After October 1, 2024 [Member] \| Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Redemption price		100.00%
Junior Subordinated Debt [Member] \| Before October 1, 2024, Amended Tax Regulations [Member] \| Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Redemption price		100.00%
Junior Subordinated Debt [Member] \| Before October 1, 2024, Equity Credit Methodology Update [Member] \| Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Redemption price		102.00%
Bonds [Member] \| San Diego Gas and Electric Company [Member] \| First Mortgage Bonds Due June 2049 [Member]
Debt Instrument [Line Items]
Debt amount			$ 400,000,000
Stated rate of debt			4.10%
Net proceeds of debt			$ 396,000,000
Debt issuance costs				$ 4,000,000
Bonds [Member] \| Southern California Gas Company [Member] \| First Mortgage Bonds, Due June 2050 [Member]
Debt Instrument [Line Items]
Debt amount		$ 350,000,000
Net proceeds of debt		346,000,000
Debt issuance costs		$ 4,000,000