Purchase commitment component percentage.

No definition available.

Name:	sre_PurchaseCommitmentComponentPercentage
Namespace Prefix:	sre_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Variable Lease, Payments, Due After Year Five

+ References

No definition available.

+ Details

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

- Definition

Variable Lease, Payments, Due Year Five

+ References

No definition available.

+ Details

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

- Definition

Variable Payments, Due Next Twelve Months

+ References

No definition available.

+ Details

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

- Definition

Variable Payments, Due Year Four

+ References

No definition available.

+ Details

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

- Definition

Variable Payments, Due Year Three

+ References

No definition available.

+ Details

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

- Definition

Variable Payments, Due Year Two

+ References

No definition available.

+ Details

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

- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308

+ Details

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

- Definition

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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

- Definition

Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

+ References

+ Details

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

- Definition

Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308

+ Details

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

- Definition

The amount purchased during the period under an unrecorded unconditional purchase obligation (for example, under the take-or-pay or throughput contract).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308

+ Details

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

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sre_SDGESegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_NaturalGasStorageandTransportationContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_NaturalGasSupplyContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_NaturalGasContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sre_SoCalGasSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_NaturalGasTransportationContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_LiquefiedNaturalGasContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sre_SempraInfrastructureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_LongTermContractsMember
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_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_RenewableEnergyContractsExpiringThrough2042Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_OtherOwnedGenerationThrough2039Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_SpotMarketSalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_PurchasedPowerContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_InfrastructureConstructionAndImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_InfrastructureImprovementsForNaturalGasAndElectricTransmissionAndDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_NuclearPlantMaintenanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_LiquidFuelsTerminalsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_NaturalGasPipelinesandOngoingMaintenanceServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sre_RenewablesProjectsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SDG&E
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Variable payments, due in 2022	$ 297
Variable payments, due in 2023	296
Variable payments, due in 2024	297
Variable payments, due in 2025	296
Variable payments, due in 2026	290
Variable payments, due thereafter	2,779
Storage and transportation
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	214
2023	204
2024	181
2025	141
2026	137
Thereafter	903
Total minimum payments	1,780
Natural Gas
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	20
2023	39
2024	15
2025	7
2026	0
Thereafter	0
Total minimum payments	81
Natural Gas Contracts
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	234
2023	243
2024	196
2025	148
2026	137
Thereafter	903
Total minimum payments	1,861
Payments	1,691	$ 989	$ 1,326
Natural Gas Contracts \| SoCalGas
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Payments	1,590	935	1,181
Transportation \| SoCalGas
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	134
2023	132
2024	114
2025	77
2026	75
Thereafter	310
Total minimum payments	842
Liquefied Natural Gas Contracts \| Sempra Infrastructure
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	435
2023	553
2024	516
2025	518
2026	519
Thereafter	1,381
Total minimum payments	3,922
Payments	$ 27	16	17
Long-term Contracts \| San Diego Gas and Electric Company [Member]
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Purchase commitment component percentage	60.00%
Renewable Energy Contracts \| San Diego Gas and Electric Company [Member]
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Purchase commitment component percentage	57.00%
Other Owned Generation \| San Diego Gas and Electric Company [Member]
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Purchase commitment component percentage	46.00%
Spot Market Purchases (Sales) \| San Diego Gas and Electric Company [Member]
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Purchase commitment component percentage	(6.00%)
Purchased-Power Contracts
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	$ 218
2023	188
2024	162
2025	105
2026	100
Thereafter	817
Total minimum payments	1,590
Purchased-Power Contracts \| SDG&E
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	218
2023	188
2024	162
2025	105
2026	100
Thereafter	817
Total minimum payments	1,590
Variable payments, due in 2022	63
Variable payments, due in 2023	63
Variable payments, due in 2024	63
Variable payments, due in 2025	63
Variable payments, due in 2026	63
Variable payments, due thereafter	430
Payments	495	$ 534	$ 744
Infrastructure Construction And Improvements
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	223
2023	22
2024	18
2025	18
2026	5
Thereafter	103
Total minimum payments	389
Infrastructure Construction And Improvements \| SDG&E
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	3
2023	3
2024	1
2025	1
2026	1
Thereafter	18
Construction projects, payable	27
Infrastructure Construction And Improvements \| Sempra Infrastructure
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
2022	220
2023	19
2024	17
2025	17
2026	4
Thereafter	85
Total minimum payments	362
Infrastructure Improvements For Natural Gas And Electric Transmission And Distribution \| SDG&E
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Construction projects, payable	4
Nuclear Plant Maintenance \| San Diego Gas and Electric Company [Member]
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Construction projects, payable	23
Liquid fuels terminals \| Sempra Infrastructure
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Total minimum payments	43
Natural Gas Pipelines and Ongoing Maintenance Services \| Sempra Infrastructure
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Total minimum payments	296
Renewables Projects \| Sempra Infrastructure
Unrecorded Unconditional Purchase Obligation, Rolling Maturity [Abstract]
Total minimum payments	$ 23