v2.4.1.9

OTHER FINANCIAL DATA - TRANSACTIONS WITH AFFILIATES (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Transactions With Affiliates Disclosure [Line Items] |  |  |  |  |
Due from affiliate, noncurrent | $ 200 us-gaap_DueFromRelatedPartiesNoncurrent | [1] |  | $ 226 us-gaap_DueFromRelatedPartiesNoncurrent | [1]
San Diego Gas and Electric Company [Member] |  |  |  |  |
Transactions With Affiliates Disclosure [Line Items] |  |  |  |  |
Due from affiliate, current | 41 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  | 1 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
Due to affiliate, current | 2 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |  | 21 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |
Revenues from unconsolidated affiliates | 3 us-gaap_RevenueFromRelatedParties / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  | 3 us-gaap_RevenueFromRelatedParties / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember |  |
Southern California Gas Company [Member] |  |  |  |  |
Transactions With Affiliates Disclosure [Line Items] |  |  |  |  |
Due from affiliate, current | 61 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |  |  | 4 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
Due to affiliate, current | 0 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |  |  | 13 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |
Revenues from unconsolidated affiliates | 19 us-gaap_RevenueFromRelatedParties / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |  | 18 us-gaap_RevenueFromRelatedParties / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember |  |
Due to/from Sempra Energy | San Diego Gas and Electric Company [Member] |  |  |  |  |
Transactions With Affiliates Disclosure [Line Items] |  |  |  |  |
Due from affiliate, current | 40 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |  |  | 0 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |
Due to affiliate, current | 0 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |  |  | 17 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |
Income taxes due from Sempra Energy | 15 us-gaap_RelatedPartyTaxExpenseDueFromAffiliatesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | [2] |  | 16 us-gaap_RelatedPartyTaxExpenseDueFromAffiliatesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | [2]
Due to/from Sempra Energy | Southern California Gas Company [Member] |  |  |  |  |
Transactions With Affiliates Disclosure [Line Items] |  |  |  |  |
Due from affiliate, current | 59 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |  |  | 0 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |
Income taxes due to Sempra Energy | (107)us-gaap_RelatedPartyTaxExpenseDueToAffiliatesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | [2] |  |  |
Income taxes due from Sempra Energy |  |  |  | 9 us-gaap_RelatedPartyTaxExpenseDueFromAffiliatesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | [2]
Subsidiary Of Common Parent S D G E [Member] | Southern California Gas Company [Member] |  |  |  |  |
Transactions With Affiliates Disclosure [Line Items] |  |  |  |  |
Due from affiliate, current | 2 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sre_SubsidiaryOfCommonParentSDGEMember |  |  | 4 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SouthernCaliforniaGasCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sre_SubsidiaryOfCommonParentSDGEMember |
Subsdiary Of Common Parent So Cal Gas [Member] | San Diego Gas and Electric Company [Member] |  |  |  |  |
Transactions With Affiliates Disclosure [Line Items] |  |  |  |  |
Due to affiliate, current | 2 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sre_SubsdiaryOfCommonParentSoCalGasMember |  |  | 4 us-gaap_DueToRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sre_SubsdiaryOfCommonParentSoCalGasMember |
Subsidiary Of Common Parent Other Affiliates [Member] | San Diego Gas and Electric Company [Member] |  |  |  |  |
Transactions With Affiliates Disclosure [Line Items] |  |  |  |  |
Due from affiliate, current | $ 1 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sre_SubsidiaryOfCommonParentOtherAffiliatesMember |  |  | $ 1 us-gaap_DueFromRelatedPartiesCurrent / dei_LegalEntityAxis = sre_SanDiegoGasAndElectricCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = sre_SubsidiaryOfCommonParentOtherAffiliatesMember |
[1] | Amounts include principal balances plus accumulated interest outstanding.
[2] | SDG&E and SoCalGas are included in the consolidated income tax return of Sempra Energy and are allocated income tax expense from Sempra Energy in an amount equal to that which would result from the companies having always filed a separate return.

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