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COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS 2 (Details) (USD $)
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Mar. 31, 2015
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| San Diego Gas and Electric Company [Member] | Purchased Power Contracts [Member] |
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| Payments Under Contractual Commitments [Line Items] |
|
| Increase (Decrease) In Contractual Commitment Amount |
$ (339,000,000)sre_IncreaseDecreaseInContractualCommitmentAmount
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_PurchasedPowerContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, Current |
(20,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueCurrent
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_PurchasedPowerContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years |
(16,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInTwoYears
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_PurchasedPowerContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years |
(17,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInThreeYears
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_PurchasedPowerContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years |
(18,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInFourYears
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_PurchasedPowerContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years |
(23,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInFiveYears
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_PurchasedPowerContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter |
(245,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInThereafter
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_PurchasedPowerContractsMember |
| San Diego Gas and Electric Company [Member] | Construction and Development Contracts [Member] |
|
| Payments Under Contractual Commitments [Line Items] |
|
| Increase (Decrease) In Contractual Commitment Amount |
(54,000,000)sre_IncreaseDecreaseInContractualCommitmentAmount
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, Current |
(95,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueCurrent
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years |
20,000,000sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInTwoYears
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years |
(4,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInThreeYears
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years |
1,000,000sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInFourYears
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years |
24,000,000sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInFiveYears
/ sre_CommitmentFootnoteAxis
= sre_SanDiegoGasAndElectricCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Southern California Gas Company [Member] | Natural Gas Contracts [Member] |
|
| Payments Under Contractual Commitments [Line Items] |
|
| Increase (Decrease) In Contractual Commitment Amount |
(43,000,000)sre_IncreaseDecreaseInContractualCommitmentAmount
/ sre_CommitmentFootnoteAxis
= sre_SouthernCaliforniaGasCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_NaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, Current |
(41,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueCurrent
/ sre_CommitmentFootnoteAxis
= sre_SouthernCaliforniaGasCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_NaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter |
(2,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInThereafter
/ sre_CommitmentFootnoteAxis
= sre_SouthernCaliforniaGasCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_NaturalGasContractsMember |
| Southern California Gas Company [Member] | Construction and Development Contracts [Member] |
|
| Payments Under Contractual Commitments [Line Items] |
|
| Increase (Decrease) In Contractual Commitment Amount |
(62,000,000)sre_IncreaseDecreaseInContractualCommitmentAmount
/ sre_CommitmentFootnoteAxis
= sre_SouthernCaliforniaGasCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, Current |
(72,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueCurrent
/ sre_CommitmentFootnoteAxis
= sre_SouthernCaliforniaGasCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years |
7,000,000sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInTwoYears
/ sre_CommitmentFootnoteAxis
= sre_SouthernCaliforniaGasCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years |
3,000,000sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInThreeYears
/ sre_CommitmentFootnoteAxis
= sre_SouthernCaliforniaGasCompanyMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Sempra Mexico [Member] | Construction and Development Contracts [Member] |
|
| Payments Under Contractual Commitments [Line Items] |
|
| Increase (Decrease) In Contractual Commitment Amount |
12,000,000sre_IncreaseDecreaseInContractualCommitmentAmount
/ sre_CommitmentFootnoteAxis
= sre_SempraMexicoMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, Current |
12,000,000sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueCurrent
/ sre_CommitmentFootnoteAxis
= sre_SempraMexicoMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Sempra Natural Gas [Member] | Natural Gas Contracts [Member] |
|
| Payments Under Contractual Commitments [Line Items] |
|
| Increase (Decrease) In Contractual Commitment Amount |
(69,000,000)sre_IncreaseDecreaseInContractualCommitmentAmount
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_NaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, Current |
(54,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueCurrent
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_NaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years |
1,000,000sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInTwoYears
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_NaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years |
(16,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInFiveYears
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_NaturalGasContractsMember |
| Sempra Natural Gas [Member] | Liquefied Natural Gas Contracts [Member] |
|
| Payments Under Contractual Commitments [Line Items] |
|
| Increase (Decrease) In Contractual Commitments, Payments Due, Current |
(138,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueCurrent
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_LiquefiedNaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Two Years |
(83,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInTwoYears
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_LiquefiedNaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Three Years |
(93,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInThreeYears
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_LiquefiedNaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Four Years |
(109,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInFourYears
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_LiquefiedNaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Five Years |
(109,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInFiveYears
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_LiquefiedNaturalGasContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, In Thereafter |
(937,000,000)sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueInThereafter
/ sre_CommitmentFootnoteAxis
= sre_SempraNaturalGasMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_LiquefiedNaturalGasContractsMember |
| Sempra Renewables [Member] | Construction and Development Contracts [Member] |
|
| Payments Under Contractual Commitments [Line Items] |
|
| Increase (Decrease) In Contractual Commitment Amount |
26,000,000sre_IncreaseDecreaseInContractualCommitmentAmount
/ sre_CommitmentFootnoteAxis
= sre_SempraRenewablesMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |
| Increase (Decrease) In Contractual Commitments, Payments Due, Current |
$ 26,000,000sre_IncreaseDecreaseInContractualCommitmentsPaymentsDueCurrent
/ sre_CommitmentFootnoteAxis
= sre_SempraRenewablesMember
/ sre_ContractualCommitmentByCategoryAxis
= sre_ConstructionAndDevelopmentContractsMember |