SAN ONOFRE NUCLEAR GENERATING STATION - ASSET RETIREMENT OBLIGATION AND SPENT NUCLEAR FUEL (Details) - SDG&E $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($)
Jointly Owned Utility Plant Interests [Line Items]
Decommissioning liability	$ 504
2024	109
2025	46
2026	52
2027	32
2028	23
Thereafter	$ 663

Decommissioning Costs, Undiscounted Future Payments, After Year Five

No definition available.

Name:	sre_DecommissioningCostsUndiscountedFuturePaymentsAfterYearFive
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Decommissioning Costs, Undiscounted Future Payments, Next Twelve Months

+ References

No definition available.

+ Details

Name:	sre_DecommissioningCostsUndiscountedFuturePaymentsNextTwelveMonths
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Decommissioning Costs, Undiscounted Future Payments, Year Five

+ References

No definition available.

+ Details

Name:	sre_DecommissioningCostsUndiscountedFuturePaymentsYearFive
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Decommissioning Costs, Undiscounted Future Payments, Year Four

+ References

No definition available.

+ Details

Name:	sre_DecommissioningCostsUndiscountedFuturePaymentsYearFour
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Decommissioning Costs, Undiscounted Future Payments, Year Three

+ References

No definition available.

+ Details

Name:	sre_DecommissioningCostsUndiscountedFuturePaymentsYearThree
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Decommissioning Costs, Undiscounted Future Payments, Year Two

+ References

No definition available.

+ Details

Name:	sre_DecommissioningCostsUndiscountedFuturePaymentsYearTwo
Namespace Prefix:	sre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Decommissioning Liability

+ References

No definition available.

+ Details

Name:	sre_DecommissioningLiability
Namespace Prefix:	sre_
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

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

- Details

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