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COMMITMENTS AND CONTINGENCIES - LEASE INFORMATION NARRATIVE (Details) - SDG&E - Purchased-Power Contracts $ in Millions | 3 Months Ended
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Mar. 31, 2024 USD ($) agreement
Lessee, Lease, Description [Line Items] |
Number of purchased-power contracts | agreement | 6
Lease not yet commenced, remainder of year | $ 27
Lease not yet commenced, year one | 59
Lease not yet commenced, year two | 80
Lease not yet commenced, year three | 82
Lease not yet commenced, year four | 82
Lease not yet commenced, thereafter | $ 834

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, After Year Four + References No definition available. + Details
Name: | sre_LesseeOperatingLeaseLeaseNotYetCommencedAfterYearFour
Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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

X
- Definition Lessee, Operating Lease, Lease Not Yet Commenced, Year Two + References No definition available. + Details
Name: | sre_LesseeOperatingLeaseLeaseNotYetCommencedYearTwo
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: |

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