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REVENUES - CONTRACT LIABILITIES (Details) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025
Contract with Customer, Liability [Roll Forward] |  |
Contract liabilities, opening balance | $ (68) | $ (196)
Revenue from performance obligations satisfied during reporting period | 2 | 55
Payments received in advance | 0 | (1)
Contract liabilities, closing balance | (66) | (142)
Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities |  |
Contract with Customer, Liability [Roll Forward] |  |
Contract liabilities, closing balance | (62) |
Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent |  |
Contract with Customer, Liability [Roll Forward] |  |
Contract liabilities, closing balance | (4) |
SDG&E |  |
Contract with Customer, Liability [Roll Forward] |  |
Contract liabilities, opening balance | (68) | (72)
Revenue from performance obligations satisfied during reporting period | 2 | 2
Contract liabilities, closing balance | (66) | $ (70)
SDG&E | Balance Sheet Location [Axis]: us-gaap:DeferredCreditsAndOtherLiabilities |  |
Contract with Customer, Liability [Roll Forward] |  |
Contract liabilities, closing balance | (62) |
SDG&E | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent |  |
Contract with Customer, Liability [Roll Forward] |  |
Contract liabilities, closing balance | $ (4) |

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- Definition Contract With Customer, Advance Payments Received + References No definition available. + Details
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Namespace Prefix: | sre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contract with Customer, Liability [Roll Forward] + References No definition available. + Details
Name: | sre_ContractwithCustomerLiabilityRollForward
Namespace Prefix: | sre_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_StatementOfFinancialPositionLocationBalanceAxis=us-gaap_DeferredCreditsAndOtherLiabilities
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementOfFinancialPositionLocationBalanceAxis=us-gaap_OtherLiabilitiesCurrent
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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