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COMMITMENTS AND CONTINGENCIES - LEASES THAT HAVE NOT YET COMMENCED (Details) - SDG&E $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) agreement
Lessee, Lease, Description [Line Items] |
Lease not yet commenced, year one | $ 30
Lease not yet commenced, year two | 59
Lease not yet commenced, year three | 80
Lease not yet commenced, year four | 82
Lease not yet commenced, year five | 81
Lease not yet commenced, due thereafter | $ 828
Purchased-Power Agreements |
Lessee, Lease, Description [Line Items] |
Lessee, number of purchased-power contracts | agreement | 6

X
- Definition Lessee, Number Of Purchased-Power Contracts + References No definition available. + Details
Name: | sre_LesseeNumberOfPurchasedPowerContracts
Namespace Prefix: | sre_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessee, Operating Lease, Lease Not Yet Commenced, Payments, Thereafter + References No definition available. + Details
Name: | sre_LesseeOperatingLeaseLeaseNotYetCommencedPaymentsThereafter
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lessee, Operating Lease, Lease Not Yet Commenced, Payments, Year Five + References No definition available. + Details
Name: | sre_LesseeOperatingLeaseLeaseNotYetCommencedPaymentsYearFive
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lessee, Operating Lease, Lease Not Yet Commenced, Payments, Year Four + References No definition available. + Details
Name: | sre_LesseeOperatingLeaseLeaseNotYetCommencedPaymentsYearFour
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lessee, Operating Lease, Lease Not Yet Commenced, Payments, Year One + References No definition available. + Details
Name: | sre_LesseeOperatingLeaseLeaseNotYetCommencedPaymentsYearOne
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lessee, Operating Lease, Lease Not Yet Commenced, Payments, Year Three + References No definition available. + Details
Name: | sre_LesseeOperatingLeaseLeaseNotYetCommencedPaymentsYearThree
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lessee, Operating Lease, Lease Not Yet Commenced, Payments, Year Two + References No definition available. + Details
Name: | sre_LesseeOperatingLeaseLeaseNotYetCommencedPaymentsYearTwo
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=sre_PurchasedPowerAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |